It's not stupidity, it's loyalty to the level of irrationality.
You'll understand the current American right if you assume that they have no attachment to the meaning of their words, and the prime axiom they operate by is: "My team is always right".
They use words as weapons to convince those who can be swayed by them, but they themselves are immune to being swayed by words, and largely indifferent to their literal meaning - only their emotional content.
This is not to deify the left, they have their own problems.
I sure hope intergalactic-capable aliens would be smart enough to understand the concept of ownership, which seems to be the sticking point here.
Maybe they wouldn't if they evolved as a hive-mind, without predators, or without inter-group competition in some other way, but I doubt it.