Convert or die isn't something God told anyone in either Testament. Penalties in Christian doctrine come in the after life.
Granted, not all Muslims subscribe to the convert or die doctrine but the doctrine is pretty well established, historically. Actually, I think it's 'convert, die, or pay tribute to Islam as a second class citizen'. The Barabary Pirates ran afoul of the early US when they were exacting tribute from merchant marines off North Africa.
It was their percieved right as Muslims to exact a tribute from the infidels. If the infidels refused, they were either killed or made into slaves. Muslims were *at least* as active as Europeans were in the slave trade at the time. And it was exacerbated by the fact they found justification for it in their religious writings.
Radical Muslims do it today: they make slaves [mostly sex slaves] of captive infidels and they feel totally justified by Allah in doing it. So yeah, I'm saying God and Allah are two different characters.
The radical Islamic doctrine is a recipe for constant strife or war with infidels.