So I have a few high school friends in Facebook who recently have become more radical (islamophobia, racism, sexism, identitarianism, etc.). As I said in a recent thread I have almost everyone but family blocked on my feed, but sometimes I make it a point to go to their profiles and see what they have posted. It usually is a lot of disinformation, misdirection, and dog whistling. I try to call them out because younger kids in my town look up to people like them and I'm worried they will become a bad influence. I also hope that, even though they will probably not become anarchists (or even run-of-the-mill conservatives) tomorrow, at least they will be a bit more empathetic to other people's pain.

My question is, do you think it is useful to do this? Will their posts or my rebuttals make any difference at all? How do you react in these situations?

More broadly speaking, is it important to have people calling bullshit when other people say blatant lies? Or is it useless and that energy would be better spent somewhere else?
On the one hand even if it is just for signaling to other people (in my particular example, muslims, the LGBTQ community, etc.) that they are not alone it seems like a good thing to do. On the other hand, I'm finding it less and less likely every day that anyone will change their opinion on anything without a massive investment in bots/shills/astroturfers. Or a good psychedelic trip :-D.

I am curious to hear your experiences regarding this and it is something I have discussed in person with other people and I always hear good arguments from both (and more) sides. Hopefully this is the right group/kind of thread and I'm doing the tag thing correctly, it is my first thread here !