Hi Bro Blume!
The man of sin, son of perdition, and the Anti-Christ are only terms for the same individual.
You will have to admit that the MAN OF SIN would indeed be an anti-christ.
The problem with preterism is that they cannot find a fulfillment of this individual....this anti-christ, man of son, son of perdition.
I disagree with those that try to place an face on this man. But that is another story.
The ISBE staes this: The reason why each age has had its fresh interpretation identifying the man of sin with the blasphemous powers of evil then most active is the fact that the prophecy has never yet found its complete accomplishment.
The man of sin has never been fully revealed, and Christ has never finally destroyed him.
One may ignore the term anti-christ in favor of man of sin...but you cannot ignore that this individual is yet in our future.
2 Thes. 2:9 (NIV)
The coming of the lawless one will be in accordance with the work of Satan displayed in all kinds of counterfeit miracles, signs and wonders,
2 Thes. 2:9-10 (NRSV)
The coming of the lawless one is apparent in the working of Satan, who uses all power, signs, lying wonders, [10] and every kind of wicked deception for those who are perishing, because they refused to love the truth and so be saved.
2 Thes. 2:9-10 (NASB)
that is, the one whose coming is in accord with the activity of Satan, with all power and signs and false wonders, [10] and with all the deception of wickedness for those who perish, because they did not receive the love of the truth so as to be saved.
None of these things occurred in 70
AD.
Also, Bro Blume, please compare this scripture with your 1 John passage.
2 Thes. 2:7 (NIV)
For the secret power of lawlessness is already at work; but the one who now holds it back will continue to do so till he is taken out of the way.
or for the purists--------
2 Thes. 2:7 (KJV)
For the mystery of iniquity doth already work: only he who now letteth will let, until he be taken out of the way.
this is that spirit of antichrist, whereof ye have heard that it should come; and even now already is it in the world.
Paul stated that AN INDIVIDUAL would come in the spirit of iniquity. John stated the same thing....in a different verbage. Spirit of Anti-Christ---spirit of lawlessness---it is the same thing.
(CEV) Children, this is the last hour. You heard that
the enemy of Christ would appear at this time, and many of Christ's enemies have already appeared. So we know that the last hour is here.
And please note
THE enemy of Christ---and not just AN enemy of Christ.
1Jo 2:18 Little children, it is the last time: and as ye have heard that antichrist shall come, even now are there many antichrists; whereby we know that it is the last time.
Note that antichrist is singular....not plural.
The teaching was that ONE would come who was THE ENEMY of Christ---and this spirit was prevailing during their time....as there were many who were anti-christ.
Call him what you will.......but he is in our future...
Blessings
Parson