It is and was called imperialism and almost every nation and civilization has done it (not that it excuses it).

Even optimistic Gene Roddenberry's Star Trek future it continues on and is a topic (the prime directive).

What do you think happened to the neanderthals?

Survival instincts are just inherently nasty but we as humans should rise above these tendencies since we have the cognitive ability to do so.

I mean for god sake look how we treat and what we do to the animals that we eat. A hundred years from now it might be seen as a serious moral slip on our part. We might all be very bad people.