What if aliens tested world govts and leaders to make humanity less evil in order to join the space society? Might explain the libertarian agenda

So in order to join the society of intelligent species in the Milky Way, or the Universe, we need to prove that humans won't be a menace to other species.
So this international UN tells the select few people they chose to interact with on Earth, prove that you're not just a bunch of apes and we might let you play with the big boys.

We've already set a VERY bad example, which was the US destroying Hiroshima and Nagasaki. Destroying empty towns in the Nevada desert should have been good enough. It didn't need to be tested out on populated cities. That probably put us on every black list that Space UN must have. Now we need to prove to them that we won't destroy ourselves or anyone else.

So maybe, our human leaders are pushing the libertarian ultra tolerance paradigm just to breed out the violence in us humans? Sure, it's a systemic dumbing down of the mass population. But at least they're not killing each other. Sure, all kinds of social norms are being overturned, but it could finally allow us to join the SPACE SOCIETY.

Just a thought I had about a possible solution to the Fermi paradox and why so many governments are acting in a certain way.