Mohamud doesnot allow any body to leave Islam. If he wants then he has to die. Please read Quran. Please read Hadisa. How many non believers were killed by Mohumad himself.
How mohumad befooled believers of Madina ( it may be Macca). When they defeted Mohumad he signed atreaty with them. Then he did underground preparation contarary to the terms and conditions of treaty. Then he attacked them unawre, killed them. Crushed them brutaly. And converted all in Islam