I don’t know why you think 20% of a population being mutilated indicates that it isn’t being encouraged. And no, Islam requires it, Christianity encourages it. Just because some people are smart enough to know they shouldn’t mutilate their children doesn’t mean it isn’t being encouraged. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2801794/
Judaism require it. And Christians notably changed that. It did become common in the US, which is a largely Christian country, but it's not like it's part of Christianity. Otherwise you'd expect this map of where circumcision is common would look more like this map of where circumcision is common. Instead it looks like this map of where Islam is common, which is a religion that actually encourages it.
I don’t know why you think 20% of a population being mutilated indicates that it isn’t being encouraged. And no, Islam requires it, Christianity encourages it. Just because some people are smart enough to know they shouldn’t mutilate their children doesn’t mean it isn’t being encouraged. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2801794/