There are 1.57 billion Muslims in the world, and a lot of them live in poor countries where there's all kinds of political strife for reasons that go beyond religion. Any group that big is going to have a few really destructive people in it who are actively involved in killing others. And it's going to have a huge majority of people who don't do anything like that.
15% of the population in Singapore is Muslim. It's mostly Malaysians, though there are also some Indians. And it's just about the safest place in the world!