It's true that written words can have an enormous range of interpretation. During my Uni studies, we had tutorials on English Literature, and the range of views about a poem or novel was astonishing, and each one valid in its own way.
I agree that life must be terrible for those who perceive a threat in every remark, and feel a need to retaliate aggressively. Those kinds of people scare and upset me, I wish they would engage pleasantly and put across their point of view without becoming insulting, rude or unkind.