You’re kidding, right?
I’ve read about evidence right here on FR! No one touches the Muslims no matter what they do, plan or say. Or rarely.
Even Hassan slaughtered 14 people and wounded more than 2 dozen, and he was a lone misunderstood person! He was a one man jihadi with tons of Muslim extremist connections.
Your statement has no truth in it.
They certainly do prosecute Muslims who are involved in terrorist activities. Look at Sami al-Arian, the Holy Land Foundation, or the “Lackawanna Six”, or, right in my back yard, the “North Carolina Seven”, for starters.
If prosecutions of Muslim terrorist conspiracies may be fairly rare, prosecutions of non-Muslim domestic terrorist conspiracies are even more rare. They certainly didn’t prosecute any of the neo-Nazi buddies of that old nut who shot up the Holocaust Museum, either.
Criminal conspiracies are hard to prove. Just announcing that you hate Americans or the government and would like to kill them isn’t enough. We’ll see what evidence they have in this case, but I have a feeling it will be more than just rhetoric. You don’t often get to be a federal prosecutor by doing things that get you laughed out of court.