In social networks the leverage point in eliminating toxoplasma from your life are the bridge people: people who are being rewarded for taking offense in your in-group, and therefore select for the worst possible behavior of the outgroup. These people act as stressors, specifically triggering ideations of worst-case-scenarios. The fix here is removing these people from your feeds/circles of influence.
I wrote more of efficient defense systems in the age of attention at https://sdrinf.com/age-of-attention .