What's your evidence for that?
What's my evidence for my statement that I don't trust them? Well, I know who I trust and who I don't, for starters ...
But if you mean why don't I trust them, I would say that I have less reason to trust them than to distrust them. Most of the atrocities committed in the last half a century against innocent citizens have been committed by Muslims under one terrorist banner or another. The Munich Olympics, the Marine bombings in Lebanon, the Lockerbie murders, the first Trade Center bombing, the Leon Klinghoffer murder, the Entebbe hijacking, the Bali bomb, the Cole, the Trade Center, the Pentagon, and Pennsylvania. Who knows how many other atrocities can be laid at their door?
The common factor in all these horrors is Islam. And before you throw the equivalency argument at me, bear in mind that the skirmishes in Ireland for example, while between so-called Christian sects, are mostly political, not religious. And those consist largely of gangsters killing other gangsters, not madmen killing buildings full of secretaries and file clerks.
I don't trust American Muslims because I don't trust Muslims. While I would trust an American Muslim stockbroker over a Yemeni Muslim guerilla, it's only a matter of degree, not quality.