why are there so many fake christians?

ive have noticed this for quite a while and its very annoying, 1 percent are true christians. when i became one my "christian" family pretty much disowned me. if i speak the bible to them they call me satanist, or a antichrist. but they support obama who is the anti christ,. i dont get it, you claim christ but you dont put it into action. on top of that the real bride of christ is persecuted not by only belivers, but by other so called christians. so many are caught up in the worldy desires, especially my family who calls them selves christians, but why is it this way just why?