You have to remember: in the early 90's, Russia had just spent the previous forty years threatening to murder every American man woman and child with nuclear
And US spend even more times threatening exactly the same against USSR, so what?
Difference being: the US didn't run themselves a Holodomor. The US had several opportunities to nuke the Soviet Union into non-existence with little consequence: up until the early 50's, there was FA the USSR could really do in response had Truman decided to unleash Patton and Lemay and a rain of nukes. And the US did no such thing. Few people would honestly expect that Stalin wouldn't steamroll anyone he wanted to (like, say, South Korea or Hungary or Berlin or Czechoslavakia or Finland or Poland or... anyone in reach, basically), or the politbureau dirtbags who followed him. There is no rational comparison between the US and the USSR: the USSR was based entirely on a system of pure criminality. When the US does bad things, it's because the US has fallen below its standards. When communists do bad things, it's because that's what the system calls for.
The point of all this isn't to get into yet another political squabble, but to explain why the US didn't immediately fall in love with Russia. The USSR and communism in general had, as pointed out, spent seventy years one-upping the Nazis in terms of criminal awfulness. It is *insanity* to welcome a murderer into your embrace mere moments after they suddenly decide they don't want to be like that anymore.
The Russian people can be all kinds of awesome. But the Russian government was still composed of a whole lot of people who had served the communists. The Russian military still had a boatload of ICBMs pointed at *me.*
When Germany and Japan decided that they didn't want to be Americas enemy anymore, they stopped pointing weapons at the US. And soon enough, the US was good friends with Germany and Japan. We appreciate not having guns pointed at our heads by people who say they're not our enemies. maybe we're weird that way.