Honestly, therapy. I basically had the same reaction when my coworkers, who i thought were pretty alright, would cough in my general direction and say survival of the fittest because I was wearing a mask during peak covid. I had a lung condition that put me at high risk, and I told them that… And that lead them to be even more hostile to me, openly saying they hoped I’d get covid and die off quickly.
I struggled with the fact that people can turn on you so fast, and that people couldn’t do the minimum effort to prevent someone they know from dying. We used to be cool, pretty often we went out to eat and hung out outside of work hours, then in the span of a couple months they were practically verbally assaulting me every day. I talked to a therapist and it really helped. I barely remember what they told me since it was years ago now, but it got me through it and I rarely think about it now.
I work in an area where it’s impossible to record their behavior, and since there were so many people doing it snitching wasn’t an option. They were smart enough to only “joke” when management was within earshot and resume actual harassment when they left.
I still work with that same group, funny enough they went back to being buddy-buddy once I got vaccinated and was able to drop the mask.
I have forgiven them in the sense that I don’t think about it when I interact with them, but now I know how selfish they are and how they’d happily push me into a wood chipper if it meant they could avoid having to wear a small piece of fabric on their face.