Thus revealing what kind of people they were at the time.
Humans do the same thing to humans all the time.
We've banned and made efforts to eradicate: children out of wedlock, children who turn out gay, disabled children, jewish children, children who aren't "aryan", more than two children to a single family...muslims, christians, uyghurs, indigenous groups all over the planet, mongols...
And it's not at all a thing of the past as in just the last 50 years we've had ~15 attempts at the exterminations of targetted groups of people.
No it just reveals that the people in charge of star trek for the past decade are incompetent and have only a passing familiarity with the franchise.
Of course it would be absurd to cast that judgement based of what could easily have just been a bad season but by this point its pretty clear that nobody running the star trek franchise actually wants to be running the star trek franchise. Thats why every new show has some bizarre cross-genre gimmick and they never try to just make a proper star trek.