It was originally Mt. Rosalie.

It was renamed Mt. Evans to honor a governor who was forced to resign, 30 years after his resignation. Evans had no personal involvement in the massacre, but did try to rationalize and even defend it. Thus, it ultimately cost him politically. Personally, I think it's many decades far removed to give a shit either way about what he did, but on the other hand,

Out of all the things to be outraged about and hills to die on, I'm fairly unconcerned about this one. It's not like it's "Mt Saint Bruce Jenner" and it's also not like a true historical name either, nor does such a name ever really educate on history. How many Gen Z's do you think have looked up Mt. Evans, and then John Evans, etcetera? It's just a name to 99.9% of the people, and I bet - prior to it being a news item - even most conservatives were not all that well informed on its namesake. It is just "Mt. Evans" to 99.9% of people, with no meaning attached to the name.

It's already a renamed rename for a mountain, the most it has been is just a familiar name while we've been alive. Spending money and wasting legislative resources is dumb, but other then that, it's not the end of the world.