Christianity has been around for about 2,000 years. People have persecuted and murdered christians COUNTLESS times in history and yet its still here. Opposing factions have tried to destroy christianity throughout the years but its still going strong. Its literally EVERYwhere. Time itself is based on the birth and death of Jesus (B.C. -Before Christ A.D. -After death), not to mention the gregorian calendar and if you walk down just about ANY sidewalk for long enough you'll eventually se a street name , hospital, or other building based on christianity .
And those are just a few examples.
Christianity is so engrained into western civilization that you cant get rid of it. It even lasted through the bubonic plague when around 50% of europe's population was wiped out. It lasted through the fall of Rome AND through the french revolution also. It will remain constant meanwhile trends and fads will come and go. God was here at the beginning and he will still be here at the end, whether people chose to believe it or not.
There literally nothing that can be done to christianity ( as a whole) that opposing factions havent already tried to do. I mean if the whole planet were to suddenly explode then that might do it but other than that. lol
*rant over*