This is how every conspiracy starts I think. Others believing that people in power have these plans laid out several decades in advance. Where in reality their plans (in democratic world) only spans several years (their active mandate).

Nobody can foresee the future. US supported Yeltsin because that was something that made sense in a given time for them. They didn't do this because they expected to make ton of money in 2022 of LNG and arms sales.

Now they were given opportunity to make some $ which also coincidence with their own interests.

But they are not able to tell what impact will this have in another 20-30 years. They do it because it makes the most sense now. Not because they have this super masterful long term play.

I more meant that they didn't want to help, because they want an enemy, not an ally.

Someone to point to and keep the military and intelligence agency funding flooding in.