Why do liberals want to live under sharia law?

Gee, I guess since we are not prejudice against the religion of Islam that means we must want to live under their laws. How about we don't live under any religious laws and that includes Christian. As an atheist I am for a secular humanist government that is impartial and does not favor one religion over another. That's what was intended in the Constitution and it would be nice if that was the way things really were. Ever since the founding of this country religious groups have wormed their way into government in insidious destructive ways.