Maidan revolution

A revolution from capitalist neocolony to capitalist neocolony?

Imperialism… is conquering and dominating foreign lands and assembling empires.

Assembling empires is the only correct part of your definition, because it happens to be a tautological statement. How can you be an anarchist and use this definition of imperialism, since all states by definition dominate territory? "Foreign" and "domestic" are purely artificial categories and using them only legitimates statist ideology.

The president of Ukraine fled to Russia but the parliament remained in place, and provided a way of triggering new presidential elections. By that time, Russian troops had taken control of Crimea

The Russian annexation of crimea happened after the president fled, as a response to the coup.

Putin declared Crimea to be part of Russia and stated that he’d never give it back

This was done via referendum. As for the rest of your comment, it is mostly just a run down of the specific events leading up to the war, ignoring the geopolitical reasons for why the different actors took the actions they did, instead looking at the events in a vacuum.

If you really want to know - when Hamas attacked Israel, I said that Israel has the right to defend itself.

Am I right to assume that the previous 70 years of Israeli settler colonialism had no impact on your opinion of how much Israel has a "right to defend itself"?

they have a right to repel the invaders, and this incldues the right to strike across borders at the invader’s command, logistics, storage and production.

Which they were already doing with their own weapons and soldiers. The escalation in question is about the use of American weapons, which will likely trigger some kind of (probably not nuclear) response from the Russians, who have the possibility of sending weapons to anti-western militant groups, or to take other actions.