Noomi, funny you should speak of getting rid of all Catholic Priests, as they prey on children.
Muhammad (when middle-aged), met a six-year old child and asked her father if he could marry her (obviously finding her pretty and wanting to have sex with her). The "child's" father said no. After her father died, he married her when she was only nine-years old. He told his followers that they could marry female children. Today, we call such individuals...pedophiles. Sick individuals who are not acceptable in society. The fact that he looked at her with sex on his mind, tells you he was a pedophile (regardless of what year he lived in). Definitely no prophet of any deity, as no deity would pick such an individual to be its representative. Thus we don't need such a religion here and it shouldn't even be on the planet.
On the issue of his advocating that his followers kill all non-believers; I find a deity that hates some humans so fiercely, yet is so weak that it is unable to rid the planet of them himself, without the assistance of puny man, to be no deity at all, but rather, a creation in a man's mind.
Personally, I'd be happy to see all religions gone and just some basic rules applied:
Treat "all" people kindly. Do not steal from others and do not kill. Men and women are equals. There is no such thing as a second-class person. Help your fellow man/woman. Marriage is not a requirement to live together. Live life and be happy.