Dude it's really all about context.

If you live in America, Christians do now and have for this countries entire existance, hold all the institutional power. And in America, Muslims are a persecuted minority, especially after 9/11.

Oh course we're going to care what Christianity does more than Muslims, it's hundreds of times more applicable.

It's like how being a Catholic in Northern Ireland is a different context than being a Catholic in Spain. When someone criticises the Church in Spain, their punching up, because that's the majority religion and where theres power. But it's punching down, or atleast across but at an incline, in Northern Ireland because and their history (which is complex and nuanced and I'm not saying all Catholics in Northern Ireland are all good people and Protestants are bad people, sectarian violence is generally emotion based)