I don’t see how you get any of that from the suggestion that Ukraine and Crimea aren’t our problems.
You're talking about European countries being taken over by overtly Communist forces waving flags of Marx, Engels, Lenin and Stalin under the cover of being "separatists," when really they are stocked with Russian military, run by Russian generals and FSB handlers. This same country is also making threats against the Baltics, and simulating nuclear strikes on Poland and the United States. It is reasonable to "get" all of that.