So what if he is?
Believers will be taken up in the Rapture and will not endure any of the terror that will be unleashed afterwards. If you are a believer and take the scriptures literally or metaphorically, then you have no control over that fate.
From another angle, let's say the scriptures are untrue and never come to pass. Will there be such a thing as an Anti-Christ then? A war nuclear and/or biological that wipes us all out? An asteroid or comet hitting the earth and bringing our demise? If those happen you'll most likely die anyway so again why worry with it? It is beyond our control.
The coming of the Anti-Christ is a good thing in my opinion. It means the rapture and Second Coming are near. Dwelling on who it is, when they will come, or the other scenarios is silliness and a waste of time.
As a side note: My MIL and my mother think Obama is the anti-christ. My mom has thought every president since Reagan was the anti-christ at some point or another.