Of the Mosques and their attendees I know, some are very pro-American. Some are very anti-American. I’ve been in a position to eaves-drop on conversations between members of the competing Mosques. Very interesting.
On month after 9/11 in Oct 2001 all the Muslim men disappeared from the IT classes in a local college. Nobody knew why. A lot of wild speculations. In December one of them returned to pick up some of their personal items. It turns out all of them volunteered to be translators for the US Government (unnamed security agencies). Many of them became translators in Iraq for the troops... a high casualty position. They volunteered for danger in defense of the USA.
The broad brush just does not apply.
Yes, a significant minority of Muslims are anti-American.
Yes, the majority of Muslims are silent. They want to go to work, take care of their family.... and avoid politics. That is no different than most Christians, Bhuddists and Hindus.
Yes, a significant minority are very pro-American and anti-terrorist.
On the other hand, when I lived in Saudi Arabia in the 90s most Muslims I encountered harbored a loathing for America.
I suspect that the Muslims who do not follow the Koran regarding infidels were mostly raised in western countries.
Great, if true. However, they can't declare themselves because the terrorist factions are more organized and will target them. A pro-American Muslim has no protection... just like a regular non-gang, non-race affiliated American citizen.