It is very alarming to me as a Christian

.... but i think the reason why the page is still there because basically they are not violating any rules on facebook. Remember, it's a social networking site and if they don't believe in Jesus Christ, we can't do anything about it. I'm sure there is a page there that's anti-muslim or anti-islam as well, and what do we do? nothing... of course, 'cause we are christians after all. but i'm sure hundreds, even thousands of muslims will also react to an anti-muslim page...
As Christians the best thing to do is to show people what Jesus taught us in the first place... to forgive people who look down on us, to forgive people who hurt us... He was rebuked, He was tortured, etc.. but did his faith lessen? no... Instead he practiced what he was preaching. so there, just don't click on the "like" button... kevs ra oi... and keep the FAITH!