There arguably IS a reasonable enough perspective that is critical (maybe not necessarily opposed, but critical) of BLM, post-modern Feminism, etc.
It might sound a bit like this:
"While basic human rights and an end to systemic oppression is important, I have family members who are police and contribute lots of positivity to the community. They are not racist and question authority and are striving to make policing more compassionate and have been for years and years, not just as a reaction to BLM. Also, just because you are a person of color who is a BLM activist and feminist doesn't mean you are automatically entitled to being a more ethical person than me. Your life does not matter simply for being black, it depends on your character. You can be a woman and person of color advocating for those things and still be a terrible person."
And so on. Things like that could probably be seen as legitimate points.
Fucking off anyone who critiques the social justice movements as though they are a nazi isn't productive. It's simplistic and doesn't require any skill or nuanced understanding of psychology or the complex events that can shape human perspective. Obviously someone who speaks with alt reich rhetoric when disagreeing with post modern social justice is a piece of shit, but you also have to take into consideration that not everyone in poor rural communities is a bigot, and they don't see themselves as privileged either (and they might be right).
An argument could potentially be made that some who advocate social justice are not inclusive enough and are quick to be judgmental and discredit someone's humanity simply because they say one thing that sounds like a disagreement.
From what I can tell, much of the conflict stems from there still being a debate between rural communities and cosmo/college towns/ etc over how to define racism, sexism, privilege. It's possible that it's not because rural peeps are backwards hicks as much as it has to do with fighting racism in a different style (more connected to christian morals, or wanting to exist in a transparent community, lack of cultural awareness, feeling like your culture/way of life of being a waspy, conservative, country person is under attack, etc).
Of course, there are also plenty of culturally backwards rednecks too, lol, but you have to remember that not everyone who has a disagreement w/ the social justice movement is one, or a nazi. I'd imagine that to them, hearing about microagressions being a form of oppression (for example) is like listening to someone whine about trivial things. There isn't as much of a holistic understanding that something like that stems from an esoteric, systematic form of inequality because they don't see it where they live.
And, as we learned in this election, people like that are EVERYWHERE and the electoral college can work in their favor. Maybe the best way to fight oppression for now is to have conversations with reasonable Trump supporters about why they voted for him and to make an effort to reach understandings and show them why/how their position is harmful instead of responding in a way that they interpret to be hostile, like shoving a dog's nose in shit. As tiring as it is to take on the role of educator so much (I feel for the POC who are STILL being put in a position of having to explain why their culture matters. It's 2017), it's important to remember that right now we are dealing with a large, fragile population of the country who can still effect the outcome of elections.