In the abstract, intellectual sense, you can be all for the rights of "marginalized peoples" and against the "the man".
But when you naively put theory into practice, you start to get some less-than-happy outcomes and get mugged by reality and start to get a visceral understanding of some facts, like
1. Turns out that the marginalized peoples are marginalized not because they're innocent noble pacifists more in tune with nature, but because they're superstitious anti-science savages who worship sacred rocks and can't be reasoned with.
2. The Man actually has a millenia-long tradition of scientific inquiry and exploration, which is how you get to have a roof over your head, food on the table, indoor plumbing, electric lights, and a lifespan longer than 30.
3. Fighting for Justice (TM) is all well and good. But when we're sitting pretty in the civilized world, there really isn't much real injustice to fight against. So like a child raised in a sterile environment only to develop allergies to everything, a society taught to attack "injustice" will turn its energies against itself, and superstition and paganism can trump science.
4. Freedom of religion is all well and good, but we in the west tend to have more personal and private religions, where my faith doesn't place any demands on your lifestyle. The savages, on the other hand, tend to have communal 'religions' with sacrifices to pagan idols in the extreme case, and elaborate restrictions on the freedom of their inherents in the most charitable interpretation. One is compatible with capital-f Freedom, one is not. Our culture is about freedom, theirs isn't. You can't compromise between the two.