Unless you have met every single Muslim in the world, you can't say that they're all for sharia law. I've known plenty who aren't, and who strongly believe in the Western belief of religious tolerance and pluralism. Don't misunderstand me; I fully realize we are up against a dangerous enemy, and I have met Muslims who still haven't understood that in deciding to emigrate to the West, they must choose to live according to its laws and accept the fact that they have to live amongst people who are different from them. But we can't stoop to the "they're all like that" attitude if we're going to win.
The Koran and Hadiths all call for Shariah law.
Now, if a Muslim isn't for Shariah law, then they are going against what their religious texts say, making them a MINO (Muslim in name only).
Saudi Arabia funds thousands of Mosques in the West, and you can bet your bottom dollar the Imams employed by these Mosques preach Wahhabism.