While I find all these points compelling reasons for why people would reject Christianity, there is another one that isn't mentioned, and it's the main tenet. When I explored Christianity as a teenager, I just couldn't wrap my mind around the idea that all you had to do to get into heaven was to accept Jesus Christ as your savior, and that this was in fact the only way. So someone could live a Christ-like life of charity and service but be rejected at the pearly gates because they didn't do this one thing, while a serial killer who raped and tortured countless people could have a deathbed conversion and get whisked right in -- that just makes no logical or moral sense to me.