Yes, you came out from the get-go immediately insulting him for daring to think he's balding, it's obvious you find this particularly stinging, probably because you're much more bald and find it offensive he considered himself balding.
Here's your first reply, in case you forgot:
At the end of day, even if he is not balding, which it's hard to say, you don't know how thick the front of his head is, and he presented some pretty sh*t pictures where it's hard to tell, this sensitive response from you reads as juvenile jealousy. You need to come to terms with your own balding and chill the f*** out.
It's really obvious who is extremely upset here. I used the term 'triggered' and you're jumping on it, you're the one clearly acting out like a child who didn't get his favoured birthday present from your first triggered reply.