I have never heard any serious Russia politician claim that the Baltics or Poland should be invaded.
Ukraine and Georgia are fundamentally different (for them), which is why they always have been red lines as pointed out in the Burns diplomatic telegram.
Poland and Russia have opposing interests. Period. Russia wants to be a part of Europe, Poland doesn't want Russia to be a part of Europe. Poland wants to be sovereign country that keeps growing economically, Russia doesn't want that. Russia doesn't need to invade Poland, it is enough to "reshape the European Security Architecture", reduce Polish chances to develop and growth etc.
Doubtful.
Of course, Ukraine was willing to undergo the required reforms. Russia and Putin is far too proud and suspicious of the West to do that.
Europe is not limited to EU or shared Western values of human rights and democracy.
The last few years have seen the talking heads on right-wing news TV become actual politicians with real power.
Dunno if that same pathway to power exists in Russia but it sure does in the US.
Putin did on one of St.Petersburg conferences, but you are right there are no serious politicians in Russia.