Even during the cold war, Americans did business with Russia. No large computers or munitions, but Americans still ate Russian caviar. There was this call to boycott it at the same time as the Moscow olympics, but I don't think anyone called it "treason". https://www.washingtonpost.com/archive/lifestyle/1980/01/31/...
> Even during the cold war, Americans did business with Russia
ie A false equivalence.
Me selling flags to Russians is doing business. That has nothing to do with the issue of what constitutes or can be construed as Treason which is certain kinds of business that ally against national interests.