Look, I'm a hardcore atheist. I despise all major world religions and think they're inherently harmful. I'd be the first to protest the moment laws begin to be influenced by religion, as they currently are in America with abortion laws. However, I respect the right of people to practice religion privately. I'm a lesbian, and I even respect that some religious people don't like that, as long as they keep it to themselves and it doesn't impact my legal rights. I also think most religious wear (like the Burka or habits) are tools of oppression for women, but I'm strongly opposed to the state interfering with what we wear).
Christianity (and all other branches) and Islam are all anti-gay and all anti women. You only need to look at the history of this country to see how much Christianity has suppressed women, LGBT people, scientific development, and so on. But no one is up in arms about Christianity here. Look at what's happening in America with the zealots in the bible belt. All forms of religious extremism are bad. Unlike America though, our government isn't currently changing laws to persecute people in the name of region.
People use their dislike of Islam as an excuse due to the perception that Christianity=white people and Islam=Muslim immigrants.
And yes, obviously no one wants terrorists and paedos (though I'm not sure how paedos are relevant to this discussion??). Most Muslims though are not terrorists, just how most Christians aren't either. Do you really think second generation British Muslims, who have culturally grown up in British schools, want to live under strict Muslim law, when they enjoy going out on the piss, smoking, and etc?