You Can't be Upset by the Circle of Life
This movie is like hating a lion for killing gazelles. Lions are a vital part of keeping the ecosystem in balance. For every planet sacrificed, many more are formed and ultimately more life can be supported. There are numerous case studies where killing off apex predators results in prey overrunning resources and ultimately the collapse of the entire ecosystem.
This is not about good or evil, it is simply a question of balance. I don't get why people insist on framing this as good vs. evil, rather than understand what Ikaris and Kingo are saying.