it's actually extremely easy as an ex-christian to be hostile towards christianity - which is your prerogative, imo! - without being bigoted against other beliefs. in fact, i'd argue that you're not really an ex christian at all if you don't make that distinction.
if you "left the church" but never stopped believing that "i know what everyone in the world ought to be believe and i should be able to make them do so", you didn't leave christianity, you just secularized it
It was a shock for me when I left the church and discovered that almost all ex-christian-oriented content ended up just hating on Islam at some point. And god help you if you should suggest that it's probably because they grew up as christians in white supremaciste states