What I do is:
- Don't click on or share fascist or demotivating content, promoting or naming them in any way.
- Whenever you see a fellow comrade using their stuff - and you know they'd reject fascism -, privately inform them to use different content.
- Share more centrist and left-wing stuff with everyone. Not just politics, also just relaxing stuff.
- With those inclined to fascism, share only non-polarising, boring content, and don't share their shit. Make them feel welcomed.
- Block fascists from reacting on you, but don't block them from seeing your content. After all, exposure is key to deradicalisation and striving for the wellbeing of all.
- Don't use Big Tech wherever possible. Use anti-authoritarian, left-wing, people-owned media. Only use big tech to get people off from there.
- Vouch for the good people to join trade unions, strike and protest, to join a left party, participate in direct and mutual aid, and those willing enough, to train to be able to defend.
- Don't share real names with each other. Use an anonymously paid VPN, cover yourself and your tracks.
- And at the end of day, be kind for yourself - have some self-care. :3