It's easy to misconstrue the intended nuance in written communications. Some folks here do playfully banter with each other quite harshly and it is not taken in a negative way at all. That said, those folks have built a relationship with one another over quite some time and have gone so far as to meet each other in real life.
I think a rapport is still being established which may have led to the reaction. This is a community made up of different personalities; where some are laid back, some are comical, some are direct, some are sarcastic, some are sensitive and some pedantic etc.
When integrating into a community you have to navigate and understand that and also allow others to understand where you stand as well.