On a spiritual level, I agree with your concept Jesusandyou, that our own rebellion against God's will is an anti-christ type of spirit within us. I also agree that Islamic terrorists (and most other terrorsists) are not going to stop any time soon. We're in this battle against terrorism for the long haul.
I'm not real knowledgeable about "end of the world" things (i.e., eschatological stuff) but I think that there will be an anti-Christ who will lead people astray before the second coming of Jesus.
As far as it being a Pope or not Matthias, I think this is all speculation. I would go so far as to say that it is unhealthy speculation. Some Catholics say it will be a pope, but I don't personally believe it to be true. Do we really think we can predict when the "last days" will come and who exactly the anti-Christ is? I think the anti-Christ, whoever he/she is, will be cunning enough that it will not be obvious.
What is the purpose of such speculation anyway? What is the fruit of such speculation?
If we remain in Christ's friendship, and in tune with the Holy Spirit, always testing the spirits, it will be more difficult for any anti-Christ to lead us astray. That is where we should focus our energy, in loving Christ and each other and remaining in His friendship so that He may live in us. Not in predicting who, when or where regarding the anti-Christ.
Whatever the personal morality of any pope (and there were some pretty bad ones) God will protect His Church. I'm not sure that this necessarily prevents any pope from teaching error. If anyone in authority, (pope, bishop, priest, or Sunday school teacher) teaches something that contradicts Church dogma, that person is in error and must not be followed.
Here is a quote from
Catholic.com (referencing Vatican II) regarding what the charism of papal infallibility is:
As Vatican II remarked, it is a charism the pope "enjoys in virtue of his office, when, as the supreme shepherd and teacher of all the faithful, who confirms his brethren in their faith (Luke 22:32), he proclaims by a definitive act some doctrine of faith or morals. Therefore his definitions, of themselves, and not from the consent of the Church, are justly held irreformable, for they are pronounced with the assistance of the Holy Spirit, an assistance promised to him in blessed Peter."
If he is not speaking as the "the supreme shepherd and teacher of all the faithful" proclaiming "by a definitive act some doctrine of faith or morals" then he could say something in error.
One more quote from the same site might be helpful:
What infallibility does do is prevent a pope from solemnly and formally teaching as "truth" something that is, in fact, error. It does not help him know what is true, nor does it "inspire" him to teach what is true. He has to learn the truth the way we all do—through study—though, to be sure, he has certain advantages because of his position.
Here's the link to an earlier discussion where we dicussed
Papal Infallibility.
Hope this helps, or does it just raise more questions?
My personal opinion on the anti-Christ is that it is working against humanity and the Church today, and has been for years. I see the spread of abortion and artificial contraception as evidence of this. Is it one evil mastermind human? I don't think so. Who needs the anti-Christ when we have the devil, the world, and our own selfishness to contend with? The same weapons God provides us to defeat these enemies can be used to fend off the anti-Christ's seductive message whenever that comes.