What makes you think if any nation or human has the capability to colonize Mars, it wouldn't get downright messy here on Earth ... or on Mars for that matter?

What makes you think if any nation or human has the capability to colonize Mars, it wouldn't get downright messy here on Earth ... or on Mars for that matter? If you say that cooperation on climate change is impossible, how will we be able to cooperate on colonizing another planet? Even if the entity that has the capability is relatively small and focused, I'm sure there would be others making it equally difficult.