No, Paul most assuredly does not "tell us: anything at all about Mecca. For those who want to read for themselves, poke here.
There's no discussion about the "Cult of Mecca" at all -- instead, there's an allusion to what is usually called the Anti-Christ. What I do see, is you trying to fob off on us an anti-Islam screed diguised as Biblical exegesis.
Interestingly, Paul leads that chapter off with this:
Now concerning the coming of our Lord Jesus Christ and our assembling to meet him, we beg you, brethren, not to be quickly shaken in mind or excited, either by spirit or by word, or by letter purporting to be from us, to the effect that the day of the Lord has come.
An interesting couterpoint to a commentary that assures us, Yet that wrath is someday to end, someday soon. The prophetic numbers are given, but that is another subject.
Perhaps you should take Paul's warning to heart.....
I hope you didn't mean this to be a serious contribution to the discussion. The Times of the Gentiles, aka Church Age, aka Indignation, are ending very, very soon.