I think you got things mixed up. Baud found no evidence for Polish intelligence saying that Russia was arming eastern Ukraine. Here's the passage that I think you're referring to, bolding the important part:
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In 2014, I am at NATO, responsible for the fight against the proliferation of small arms, and we are trying to detect Russian arms deliveries to the rebels in order to see if Moscow is involved. The information that we receive then comes practically all from the Polish intelligence services and does not “match” with the information from the OSCE: in spite of rather crude allegations, we do not observe any delivery of arms and materials [from the] Russian military.
**
Source:
Former NATO Military Analyst Blows the Whistle on West’s Ukraine Invasion Narrative | Scheerpost
In an ideal world, the only reason the U.S. got involved in Ukraine was to have friendly relations with it. In the real world, it seems that U.S. powerbrokers' primary goal was to get more resources and weaken Russia. Did you think Russia would just take it lying down?
For all Fidel Castro's flaws, his main concern seems to have been to protect Cuba from U.S. takeover attempts, like the failed Bay of Pigs invasion. For its part, Russia was angry that the U.S. had put nukes in Turkey, Turkey being right next to Russia's border. Fortunately, JFK wisely decided to strike a deal wherein they would remove their nukes from Turkey and Russia in turn would remove its nukes from Cuba.
This time around, Russia has no nukes in Cuba, so it behooves the U.S. to stop arming and training the Ukrainian army.
I find it rather odd that Baud relies solely on anonymous Polish intel sources, to the exclusion of all else. I give it no weight, and his "findings" are irrelevant.
Again, you've gotten things mixed up. After looking into the matter himself with his team, Baud found no weight in the Polish intelligence claiming that Russia was arming eastern Ukrainians.
Castro promised democracy and delivered dictatorship. His motive was to maintain dictatorial power.
I imagine he thought he was doing what was best for his people. In any case, I think we can agree that Cuba didn't invade anyone, while the U.S.'s CIA certainly did attempt to invade Cuba. Fortunately, JFK reigned them in. He may have paid with his life for that.
We've been trying to weaken Russia since the Cold War started, ... as we should.
There was a time, however brief, when U.S. and American interests had some commonalities after perestroika. Unfortunately, the peace dividend was squandered, in favour of ramping up a second cold war that's been warming up for some time now.
It behooves the West to have a Western friendly Ukraine, and to support Ukraine's complete separation from Russian control.
Again, I think your idea that the purpose United States government's involvement in Ukraine is incredibly naive. Have you ever heard of Major General Smedley Butler, a senior United States Marine Corps officer? He made a speech and published a book with it as well called "War is a Racket". Quoting a bit from its introduction:
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War is a racket. It always has been. It is possibly the oldest, easily the most profitable, surely the most vicious. It is the only one international in scope. It is the only one in which the profits are reckoned in dollars and the losses in lives. A racket is best described, I believe, as something that is not what it seems to the majority of the people. Only a small 'inside' group knows what it is about. It is conducted for the benefit of the very few, at the expense of the very many. Out of war a few people make huge fortunes.
**
Source:
https://en.wikipedia.org/wiki/War_Is_a_Racket
You also still seem to be under the impression that Ukraine is a united country, despite the fact that it had been in a civil war for 8 years prior to Russia's military intervention. There is also plenty of evidence that Russia's intervention was provoked by western Ukraine's renewed military assault on the Donbass area just days before Putin decided to start his military operation. On the day he started his military operation, he aired a speech wherein he made it clear that one of the reasons he decided to intitiate said operation was to aid in the Donbass republics' defense.