I've seen just as many people targeted and attacked by Christianity. People who had their self-esteem torn to shreds, to make them more vulnerable and accepting of the ideas which the Christians would coincidentally offer as means to make their lives better.
I've also seen Christians target those who are troubled, not just because they need help, but because they're open to conversion. Yes, the depressed person who turns their life around is better for it, but people at such times are vulnerable, easy to persuade... yes, the people get the help, but the Christians get more than just the good feeling of having helped someone.
I do charity work, and help others. My faith never enters the equation unless the other person brings it up, and even then I only discuss if they are genuinely interested. But evangelism is part of Christianity, which means that missions which do charity work won't just bring it up, they'll actively try to convert those they help.
I do not fault people for having faith, or for using their faith to guide them to troubled times. I fault them when they try to convert others, when they try to take their beliefs and turn them into law (thereby forcing their beliefs onto all of us), or use their faith as a reason to treat others poorly... nothing I've said is based on their belief in a God, but based on how they act and what I have personally seen them do.