I didn't say hostile to the U.S. I said hostile to the West. That doesn't mean cutting off contact or anything so silly, but let's not act like Russia has not long been at odds with the general foreign policy of the West.

Even post-Cold War, it dates back to stuff like Bosnia and Kosovo. Remember reading the "TIL" about that singer who used to be in the British armed forces and claimed to have avoided WWIII by not attacking Russian troops at an airport in the Balkans during Bosnia?

The way Russia views it, the West has certainly been antagonistic towards them, between the NATO expansion, possible construction of missile shields in east Europe, intervention against their Serbian brothers in Bosnia and then Kosovo, open talk of friendship between the U.S. and Georgia, the difference in perception over what was authorized in the Libyan intervention, and later the EU trying to influence Ukraine away from Russia.

You are certainly right that there are domestical political reasons for Putin to play up an external enemy, but his behavior is certainly consistent with, at best, an antipathy towards the West. Sure, they'll play along in international politics as it becomes convenient to them, but the USSR did that too.