Genuine question, what would happen if he flew over those countries? Aside from shooting down his plane, I’m not clear of what they could do?

They could send interceptors asking the pilot to land immediately. Civil planes must comply.

And if they don't, owner of the air space is within legal right to shoot it down.

Obviously these limp dick eu regimes wouldn't never do bibi like that because you know... This vermin got a genocide of do

EU Regimes

I’m sorry, what the fuck dies that mean?

Is this some tankie shit I’m too sober to understand?

I’ll take a guess: A regime is a government. EU likely refers to the European Union, given the context.

Regime reˈʒiːm SUBST abwert. eine diktatorische, undemokratische Regierung(sform), in der eine Person oder eine Gruppe von Personen (auch unter Einsatz von Gewalt und Unterdrückung) ihre Macht behauptet und durchsetztein totalitäres Regime

In english use, at least in my american experience, it is still a perjorative term but it is usually an accusation of authoritarianism levelled towards (usually democratic) governments and doesnt require it to be a dictatorship or totalitarian.

Most of the time it’s used simply as a mark of disapproval. Calling it the currently elected government a regime is not uncommon usage.