just deciding that anyone that doesn’t like the west must be good

Assuming you’re talking about the average tankie, this isn’t the position they hold. Their argument is “America is the greater evil, therefore supporting America’s enemies is the lesser evil, even if those enemies aren’t good themselves.” Russia is about as rabidly anticommunist as America is these days, but most communists around the world support Russia against America because America is very clearly the greater evil. The whole conflict in Ukraine wouldn’t have started in the first place if western powers didn’t back a color revolution to replace the Russian-leaning president of Ukraine with a Europe-leaning-and-also-fascist one.