Well, it's not as if WW2 was some minor event. It's not even clear if a majority of people wanted it to be removed anyway. The university official simply said "I have received complaints." How many complaints? They didn't share that information. Why not at least put it to a vote, to see if the majority actually wants it to be removed? I've never seen or heard of this mural before, so it's no skin off me, but what struck me is how arbitrary and cavalier the decision was to remove it.
I understand the need to promote diversity, to end injustice, racism, bigotry, and to be a more egalitarian and inclusive society. This is especially true on college campuses. So I get what they're trying to do. I understand and support those laudable goals. But some things that are done in the name of pursuing those goals seem more symbolic than substantial, and could possibly be counterproductive.