Basically Batman versus Superman gave a super clear reaction to what happens if you get triggered by a word.
Martha is the last thing Bruce’s father said before he died, it brings him right back to the moment Bruce’s parents were killed.
Bruce reacts violently to the name actually, and he only stops when Lois tells him that Martha is Clark’s mother. That’s when Bruce realizes Superman is human.
And people don’t seem to understand that Bruce was triggered by the name, and he and Clark did not just become instant friends because their mothers share a name.