Because not everyone who practices the Muslim faith hates Jews enough to kill them. You're taking the opinions of extremists, and blanketing the entire faith with them. It's tantamount to saying 'all Jews are cheap' or something along the same lines, only the assumption you make is much worse.

It's true. If every Jew married someone of a different faith, and chose not to practice Judaism anymore, the religion would eventually disappear. But Jews marry Muslims, Catholics, Christians, athiests, pagans, Buddhists, people of all different religions and beliefs all the time, and many people choose to share values from both sides with their children and family members. Isn't a world where people can see the right and the good in all faiths better than one where individuals, such as yourself, so readily take such a hateful and extremist stance against their fellow man?