The strong words of Irenaeus

Here are some select passages for Romans chapter 1 on Irenaeus’ use of Holy Scripture;

Romans 1:17 (A:H; 4.34.2);

CHAP. XXXIV.--PROOF AGAINST THE MARCIONITES, THAT THE PROPHETS REFERRED IN ALL THEIR PREDICTIONS TO OUR CHRIST.
1. Now I shall simply say, in opposition to all the heretics, and principally against the followers of Marcion, and against those who are like to these, in maintaining that time prophets were from another God [than He who is announced in the Gospel], read with earnest care that Gospel which has been conveyed to us by the apostles, and read with earnest care the prophets, and you will find that the whole conduct, and all the doctrine, and all the sufferings of our Lord, were predicted through them. But if a thought of this kind should then suggest itself to you, to say, What then did the Lord bring to us by His advent?--know ye that He brought all [possible] novelty, by bringing Himself who had been announced. For this very thing was proclaimed beforehand, that a novelty should come to renew and quicken mankind. For the advent of the King is previously announced by those servants who are sent [before Him], in order to the preparation and equipment of those men who are to entertain their Lord. But when the King has actually come, and those who are His subjects have been filled with that joy which was proclaimed beforehand, and have attained to that liberty which He bestows, and share in the sight of Him, and have listened to His words, and have enjoyed the gifts which He confers, the question will not then be asked by any that are possessed of sense what new thing the King has brought beyond [that proclaimed by] those who announced His coming. For He has brought Himself, and has bestowed on men those good things which were announced beforehand, which things the angels desired to look into.(6)
2. But the servants would then have been proved false, and not sent by the Lord, if Christ on His advent, by being found exactly such as He was previously announced, had not fulfilled their words. Wherefore He said, "Think not that I have come to destroy the law or the prophets; I came not to destroy, but to fulfil. For verily I say unto you, Until heaven and earth pass away, one jot or one tittle shall not pass from the law and the prophets till all come to pass."(7) For by His advent He Himself fulfilled all things, and does still fulfil in the Church the new covenant foretold by the law, onwards to the consummation [of all things]. To this effect also Paul, His apostle, says in the Epistle to the Romans, "But now,(8) without the law, has the righteousness of God been manifested, being witnessed by the law and the prophets; for the just shall live by faith."(9) But this fact, that the just shall live by faith, had been previously announced(10) by the prophets.

Romans 1:18 (AH; 4.27.4);

4. Since therefore, beyond all doubt and contradiction, the apostle shows that there is one and the same God, who did both enter into judgment with these former things, and who does inquire into those of the present time, and points out why these things have been committed to writing; all these men are found to be unlearned and presumptuous, nay, even destitute of common sense, who, because of the transgressions of them of old time, and because of the disobedience of a vast number of them, do allege that there was indeed one God of these men, and that He was the maker of the world, and existed in a state of degeneracy; but that there was another Father declared by Christ, and that this Being is He who has been conceived by the mind of each of them; not understanding that as, in the former case, God showed Himself not well pleased in many stances towards those who sinned, so also in the latter, "many are called, but few are chosen."(3) As then the unrighteous, the idolaters, and fornicators perished, so also is it now: for both the Lord declares, that such persons are sent into eternal fire;(4) and the apostle says, "Know ye not that the unrighteous shall not inherit the kingdom of God? Be not deceived: neither fornicators, nor idolaters, nor adulterers, not effeminate, nor abusers of themselves with mankind, nor thieves, nor covetous, nor drunkards, nor revilers, nor extortioners, shall inherit the kingdom of God."(5) And as it was not to those who are without that he said these things, but to us. lest we should be cast forth from the kingdom of God, by doing any such thing, he proceeds to say, "And such indeed were ye; but ye are washed, but ye are sanctified in the name of the Lord Jesus Christ, and by the Spirit of our God." And just as then, those who led vicious lives, and put other people astray, were condemned and cast out, so also even now the offending eye is plucked out, and the foot and the hand, lest the rest of the body perish in like manner.(6) And we have the precept: "If any man that is called a brother be a fornicator, or covetous, or an idolater, or a railer, or a drunkard, or an extortioner, with such an one no not to eat."(7) And again does the apostle say, "Let no man deceive you with vain words; for because of these things cometh the wrath of God upon the sons of mistrust. Be not ye therefore par- takers with them."(8) And as then the condemnation of sinners extended to others who approved of them, and joined in their society; so also is it the case at present, that "a little leaven leaveneth the whole lump."(9) And as the wrath of God did then descend upon the unrighteous, here also does the apostle likewise say: "For the wrath of God shall be revealed from heaven against all ungodliness and unrighteousness of those men who hold back the truth in unrighteousness."(10) And as, in those times, vengeance came from God upon the Egyptians who were subjecting Israel to unjust punishment, so is it now, the Lord truly declaring, "And shall not God avenge His own elect, which cry day and night unto Him? I tell you, that He will avenge them speedily."(11) So says the apostle, in like manner, in the Epistle to the Thessalonians: "Seeing it is a righteous thing with God to recompense tribulation to them that trouble you; and to you who are troubled rest with us, at the revealing of our Lord Jesus Christ from heaven with His mighty angels, and in a flame of fire, to take vengeance upon those who know not God, and upon those that obey not the Gospel of our Lord Jesus Christ: who shall also be punished with everlasting destruction from the presence of the Lord, and from the glory of His power; when He shall come to be glorified in His saints, and to be admired in all them who have believed in Him."(1)

Summary

Irenaeus uses strong language for the cause of the Gospel, and he is right to do so.  St Paul also used strong feelings in his words when the Gospel was threatened. The liberal tradition such as Heikki Räisänen miss the point when they compromise the teachings of the Gospel or try to change things as they really are for the sake of peace in the Global Village.  Peace comes out of respect for the other person being honest.  A Christian should not use heretical ideas to try to move Christianity forward in some type of Hegelianism or other isms.