Many did, but many did not, entirety of eastern europe (minus Russia), germany, nordics, balkans, and central european states had no history of colonization or very little, and even then it was not in the regions most associated with migration to europe. Only things besides colonization that come to mind are wars in the middle east, and every country I listed besides germany is too small to matter in that.
They didn't do much colonization because they were too busy fighting wars with each other... For centuries... WW1 and WW2 and even the current conflict is just singular events in long line of internal wars of Europe.
Also something that should not be easily forgotten or ever forgiven is the missionary work by religious groups... Destroying cultures around world. It is sad we have not punished them for that and maybe even banned them to protect the future.
>They didn't do much colonization because they were too busy fighting wars with each other
No, nearly every one of the countries I listed had simply no intention or means to colonize effectively at a profit, has nothing to do with preoccupation with continental wars.
> Also something that should not be easily forgotten or ever forgiven is the missionary work by religious groups
Again, all of the countries I mentioned had very little if not null participation in this, and yet to varying degrees they are being punished for it...
