I am sorry to hear that. I presume some people just don't know how to behave. Don't feel sorry, if people are d!cks they deserve to be thrown out of your timeline.

I suddenly realized that quite a few users I follow blocked me. So I blocked them back.
I tend to avoid blocking. Most times muting an account is enough, but if we happened to have interactions and you block me just because I wrote something you disagree with, without even giving me a clue or taking part in the conversation, then it's over for me too.