Religious Differences

I am knowledgable about a few religions: Lutherans, Roman Catholics, and Reform Judaism.
I am familar with a few religions: other major Christan sects, Mormons, Hindis, and Islam.

Only Islam threatens death to those who dare convert from Islam to another faith.
Why does Islam require the pain of death to keep the 'faithful'?

Only Islam demands others to accept and obey their religious laws.
Other faiths have difficulty in accepting and obeying the laws of society which conflict with their beliefs, but they 'render unto Ceasar, what is Ceasar's'.

Some sects (ie: Amish) disagree with society, so much so, that they retreat from society. But they still respect the laws of society, they simply withdraw from society. They don't insist that everybody stop using technology because they consider technology evil. They simply don't use the technology that goes against their beliefs.