Why is every president the anti-christ?

with a quick google search I have found that somewhare during the middle of every presidents term since the 40's the president was believed to be the beast in revelation. ragen, bush 1, clinton, bush 2, obama seem to be best contestants for the job most likely because they were around while the internet was around. now being only 23 from what i remember of clinton he wasn't particularly evil he just had a thing for blow jobs... so do i, would that make me the anti-christ along with him? bush wasnt particularly evil either I'd just wish they gave him a math test before he was put in office. obama dosnt strike me as evil either but then again by now i've heard "heard it's the end of the world" and "he's the anti-christ" so many times i'm slightly jaded and unaffected. so my question is what is the point of calling everyone the antichrist when clearly no one can say who the anti christ realy is?