I find it hard to believe that they would last that long in the general population. I think they'd rank around the lowest levels: child molesters and such.
I would hope so. But there are a lot of sicko Muslims in prison. From what I have read, most violent criminals convert to prison-style Islam, which is probably akin to joining Al-queda. But, there are still a lot of good old fashioned non-Muslim bad boys there as well. My guess -- they are dead within twelve months.