They were invaded by 1 of the 2 nations that agreed to protect them if they disarmed. The US did not uphold its obligations 3 times in a row through multiple administration's. The latest conflict in Ukraine is a result of actions taken by the USA, followed by inaction on our part.
If we didn't request their disarmament, lie about protecting them, it would be a very different landscape there right now.
It isn't solely the fault of the US, but we are major contributors.
Teaching children how to make weapons is the recipe for revolution. Its not instant, but its something i would think twice about as an autocrat. Its like training a bunch of Unibombers.