Sadly, it's quite typical. The most atrocious example of this mentality is (still, after so many years) US propagandist efforts to make everyone believe, that their participation in the WWII was decisive, with D-Day being the turning point, that ultimately brought the victory over Nazis. When someone dares to notice, that there were Kursk and Stalingrad in 1943 and a full-on race to Berlin quite some time before the first American troops even landed on Omaha beach, the official propaganda dismisses all evidence or smears the Russian side: like, yeah, sure, they helped a lot, no shit, but it was only possible, because Red Army was overrunning German tanks with millions of vodka-infused unarmed savages, who were machinegunned in the back by commissars, oh, and don't forget lend-lease and food, that US was providing to Russia, otherwise Hitler would have taken Leningrad in 1941...yadda-yadda
Adequate people tend to understand, that any such collective fight (conquering space is also a real fight) is collaborative, and every party plays an important role. Denigrating former allies after the fight is finished is behaving not like a human, but like an ape. It's equally disgusting to see this happen both on Russian and on American side.