Austria isn't as blatant as Hungary but their policy is also pretty russia-friendly.
And there is a reason A-H collapsed and it wasn't just because of WW1 and Bosnian Serbs. Poles, Czechs, Slovaks, Romanians or basically anybody who wasn't German or Hungarian hated the monarchy in the end(With the possible exception of the Croats, who reached some kind of agreement with Hungarians right before the collapse).
As long as they control the government, military, police and other stuff putin and his regime are russia. If russians don't like that they can make their own Maidan.
Whether he is a legitimate military target is disputable, because the whole war russia started is illegitimate. Although granted, at least he isn't a medic or a child.
All he had to do was to not force Czechoslovakia to surrender and he didn't need military presence in Czechoslovakia, deploying troops to France might have been enough. Czechoslovakia had mobilized 1 million man strong army, which would have been able to hold Germans for a considerable time. Not to mention he might have been able to get Poland to join.
Also I am not sure about which Churchill's plan to protect Poland you are talking as by the time Churchill became a PM, Poland was conquered and Germany was just starting attack on France.
I think you are onto something. Especially Mastodon devs are losing so much.