Well, it's not about "these Russians", just because you met some rotten apples.
In general they got a culture reaching back to a few centuries, which US can't offer.
So, we have riffraff here from many countries, but I admit there are wealthy Russians with less education/manners.
For Thais we are all farangs, no matter where we're coming from unfortunately.
Rude behavior, however could be seen by many. Thais also, or Chinese, Brits, Germans, Swedes, aso (long list)🧑🎄