People are assholes, and once the lid pops it is difficult to put it back on. What you did could have been the metaphorical straw that broke the camel's back.

Don't take these people seriously unless you feel that you have wronged them. They are dealing with their own shit, and you shouldn't let them drag you into it. Apologize and move on. Anything they say after that is their poor attempt to cope with the situation.