When we look back at European colonialism in history, do we usually look past the European powers perspective?

I realize that the big empires like the British and Spain were bad and had no right to invade other territories and change their culture. But when you look at their perspective, some of the things those people did before they were invaded were horrible. I mean in history class my history teachers usually just say the colonists were bad and forced them to change to their culture period. That's true, they shouldn't have done that, but one of the reasons why they did it was because people in SOME (emphasis on some) of those lands they colonized were killing each other and had human sacrifices, they were savages. I believe that is a good reason to interfere, of course not the same way as the colonists did. But of course the colonists were far from perfect, and were also pretty brutal. What the colonists did to the people they colonized were horrible and should have acted in a different way. I also realize that that was far from the main reason why they colonized. They mostly invaded to strengthen their country such as strengthening the economy. So what do you guys think, should people take this into more account when looking back at European colonialsim in history. Or do you guys think I'm an idiot and completely wrong. Sorry if this is a stupid question or I offended anyone somehow.

PS: By the way I didn't know what section to put this question into, so I put it in a section where a lot of people go.