Aside from this very rational fear, is there any reason for anyone to actually want to become or remain a "christian?"
Fear of eternal torment at the hands of an angry deity is quite rational, even if there remains no evidence for such a place. Pascal said it best when he promoted his fire insurance evangelistic tactic. The trouble is, he didn't know there were actually other belief systems and faiths out there that contradicted his own, so his wager isn't as easy to take as one may think. It also lacks evidence. But self-preservation is a stronger need than morality, honor or dignity, so it is easier (and possibly saner) to take the blue pill and worship a being solely out of fear of eternal torture than it is to stand by your principles and risk offending the said capricious deity.