Why do some use Gandhi's favorite saying, 'I like your Christ. I do not like your Christians. Your Christians?

He is saying that the Christians he has met are not nice people and are hypocrites. Even though he finds some value in the teachings of christianity, he doesn't see people who say that they are believers, are actually followers of the teachings. He already rejected christianity, but it would be ok for others to believe in, only if they didn't contaminate or pervert the original teachings. It's those Christians themselves, who make Christianity look so ugly, that others would have to reject it because of those hypocrites.