Earlier quoted context omitted.
Why do you jump to the conclusion of parent being the problem? Your comment implicitly accepts that people's social skills can be problematic, but you assume it isn't the manager?
I actually do not really mean what I wrote. I disliked what the commenter had to say about other people's social skills in a different thread and wanted to get one in. Not my most mature moment.
Anyway, maturity is overrated, and sometimes A holes need to be called A holes, I haven't read the comment at issue so whether the parent deserved it is left as an exercise for the reader.