Well if bad actors were using foreign ally intel to spy on US citizens couldn't we be doing the same to mask their involvement for targets Q team are after? Example: Anwan (foreign) has all the goods, allies catch him on "unrelated" charges and find what he has in the process. (Like ramsey yousefs laptop) In the interest of national security, they do the right thing and turn it over to us. Homeland security passes this info to appropriate law enforcement agencies who then build cases for prosecution. Nothing technically links back to US Intel and Anwan did what he did for his own reasons.