Viet Nam was a Russian puppet state already; Russian pilots flew those Migs. The REd Chinese also provided aid; there would have been no North Viet Nam without Russians and China.
North Korea was a Russian creation. Stalin convinced Mao to get involved, then got cold feet and bailed, then made Mao pay for his military gear up front. lol
You really have zero clue, much less a point here. We had allies that needed to know we would stand up for them. I realize you think that's a war crime when the U.S. does it and think it's wonderful when the commies start these wars, but you're just full of shit, is all. Viet Nam sits astride one of the most active shipping and trade routes on the planet. Means nothing to Burb Brats, everything is invisible to them, because others are doing all the work for them while they sit around whining about everything that doesn't suit them.
We were in a global strategic proxy war. There was a lot more to it than just NV and Korea at stake; there was also Indonesia, the ME, and Africa. A full on invasion would have tied down a lot more resources.
As for '50,000 dead', Americans didn't really care about that as we know from the yearly slaughter in our own highways, which far exceed the VN casualties by multiples over the same time frame. You don't care either, it;s just another gimmick for you and the other Burb Brats..