That's a lot of words to type to say, "I support Nazis being able to openly operate and recruit on Facebook."
If they promote violence or brigade, harass, or attack other members directly on FB then. Then yes, they should have their pages shut down. That is more than sufficient rather than saying any language that can be categorized in a very broad and vague category will be banned.
The simple fact alone if you asked various people in America to define a "literal Nazi" you'll get a hundred different answers of who should fit into that category.
And for definitions: I think it’s very clear to indentify fascist thought - favorable views on ethnic cleansing and stories about mighty groups of people that can’t be proven should never be tolerated.