Individual level, educate yourself and learn compassion:
https://youarenotsosmart.com/2022/06/27/yanss-236-how-minds-change/
https://www.streetepistemology.com/
https://en.wikipedia.org/wiki/How_to_Read_a_Book because we have a lot of people who really think they know more about things than they do, based purely on social media posts and sensationalized news. "bAn ALl ReLIGIOnS" is such a highschool tier take that speaks to incredibly poor understanding of human culture, society, philosophy and psychology. Religion is just organized and political spirituality. And we need things that spirituality can offer, and materialism (capitalism) has nearly robbed us of it. And spiritual does NOT have to fucking mean believing in some skydaddy, it can just mean being able to STOP and be with all of life, as it is, within any given moment. You can frame it with the awe of quantum fucking mechanics if you want. Go watch Carl Sagan at the very least. Christianity had one fucking job and they couldn't have failed more catastrophically... But I digress... Though understanding the difference between RELIGION and SPIRITUALITY (and what NEEDS spirituality fulfills) would go a long way in guarding against cults.
A lot of the time dealing with cults or cult-like communities requires you to do things that go against your every impulse.
Respect your own boundaries but keep a door open provided your boundaries are respected.
Do not belittle the people in the cult. Do not demonize. I CANNOT emphasize that part enough. If you can't stop yourself, you best avoid these situations because you will only make it worse.
Actively seek to understand what the person is getting out of the cult (usually it's basic social acceptance - which is exactly why vilifying cult members only works in the cult's favor - see MAGA). If they believe they are getting some spiritual need fulfilled, you better have really good understanding of what that need is before you try to talk about it. Read the relevant philosophy and so on. There are no ideas in the world that can't be twisted into a cult rhetoric.
Cults chiefly work by predating on people who feel like they aren't HEARD or SEEN by others. Their experiences are dismissed or straight up ridiculed. This seems to be an impossible pill for some people to swallow and they seem to legitimately think that calling people idiots will surely make them feel bad and get back in the route of sanity Spoilers: it just makes them run right into the welcoming arms of the cult's spokespeople who shower them with (seemingly) unconditional love and validation.
Once the cult is their only social circle, it's basically impossible to extract them. Unless you are willing to see them COMPASSIONATELY as basic humans whose behavior is ultimately dictated by very basic needs for human connection, you will have no hope of reaching them.
Most people make the mistake of thinking that if they can just communicate some very smart and clever narrative to the people in the cult, they will be able to change their minds. But what that tends to accomplish is that you just put the person on the defensive. It's actually even worse if you manage to get through to their intellectual faculty because then you have effectively demolished some faith-based thing that they have but you are offering nothing in return. Instead all they have now is feeling like they are an idiot and YOU know it. But they can still run back to the cult and stick around on principle. So all you did was make them dig their heels in, because now they KNOW all the rest of the world is able to prove that they are stupid and nobody wants to feel that. Basically in the cult they will have all their social contacts, support network, possibly even their financial security. Few people are going to choose feeling stupid, alone and destitute over that.
Unfortunately most people will jump at the chance to tell another person that their beliefs are stupid. And even more so they will jump at the chance to tell another person that they are morally inferior.