one reason for the Norinco ban was because they do or did sell to terror organizations. Not really surprised.
And the USA may or may not have provided weapons to people we NOW consider terrorists in Afghanistan, just because it was convenient at the time. And France may or may not have provided weapons to the Rwandan army and Hutu militias during the 1994 Rwandan Genocide. And, and, and...
Big governments like to meddle in the affairs of smaller governments. We stick our fingers into regional conflicts, and we label the people we are helping as "freedom fighters." Then later we get upset when those freedom fighters turn turn into terrorists after we lose interest in the region (either because we achieved our immediate goal or because of a political shift here at home).
When I buy guns, I am always looking for a combination of reliability and cost effectiveness. I hear people yelling about "BUYING AMERICAN," but that's not as easy as it used to be. Some American companies (Springfield Armory) barely make any guns anymore. They just import Croatian, Brazilian, and Czech guns and stamp their names on them. Other companies (Ruger, S&W) have made statements and decisions that are inflammatory toward RKBA supporters. Other companies (Winchester) may still make some guns here, but they are owned by foreign companies (FN in the case of Winchester).
People are people, and one of the clearest lessons of history is that people do nasty things to each other. No nation has clean hands. No large company is "pure" in terms of its national identity. If you want a 100% American gun, then you would probably have to go with one of the smaller manufacturers like Keltec, Accu-Tek, Hi-Point, Heritage Mfg, or Cobray/Leinad, or one of the Bryco/Jennings/Jiminez/Raven/Phoenix/Davis/Lorcin guns. I can't even guarantee that all of those are "pure American," and even if they were... ours is a nation that has directly supported terror in recent history.
I buy the best guns I can get for the least money possible, regardless of where those guns may come from.