The USG uses sanctions against organizations or individuals that act against its interests. When it is in a war, nationals from that country will receive increased scrutiny but I hope USG have learned from the internment of Japanese citizens in US during WWII that there is a line that shouldn’t be crossed. (Gitmo indicates they have indeed learned something.)

I understand your point about how unfair and unjust guilt by association is. In a country that hoists the banner of freedom and attracts the best and the brightest from around the world, the US must take steps to protect civilians in the US from bigotry and discrimination. Regardless of their background.

I apologize for the current political climate causing Russians civilians in the US to feel this way. If it is of any solace, be assured they are not alone in their experiences.