Colonialism is not a rare event, it happens ALL THE TIME, EVERYWHERE. If you’re only finding fault with the ongoing efforts, and giving the rest a pass because they are no longer visible in your day-to-day life, you are effectively saying success justifies it. Otherwise, you’re just being arbitrary and inconsistent.
The point that I and others have made, is that all states in existence today are ultimately founded on colonialism. It’s disingenuous to suggest that some are innocent of it. They are not, they merely finished earlier. Given that, why do some states deserve to be dismantled but not others?
If the purpose is to halt the process of colonialism, there are ways to do so that are less drastic and controversial, and more likely to have a net positive result for all parties involved (or happen at all).