AITA: Friend of my childhood bestfriend angry over my comment about his story.

so its been months. one time there is friend of my bestfriend who tell me a story how he pissed at the cops for giving him tickets for speeding and violating red light

my reaction was "bro its your fault how come you pissed? its stupid bruh you speedin how come u mad😂" he mad

then he blocked me. but i dont realize. after months. i realized he blocked me.

i asked the groupchat, no one answer. then i ask my bestriend why he blocked me. he said "he doesnt like you, you called him stupid. i dont want a part of this."

well i told him then im sorry i was kidding since he speeding and get ticketed. i dont mean to insult him.

after i have the chance to meet in person, we are in my bestfriend room. i apologize genuinely "Hey im sorry for the comment i make. i wont do it again. i know when to apologize when i overstepped other boundaries." but his handshake was limp and dont even bother to give a response. when he want to go home, he greet and say farewell to everyone but me. like im not there. so petty, giving attitude, and immature.

what the fck? we are 20 years old. how come you dont let it go? what else do you want?

i told this to my other friend. he told me he been speaking in the back about me, saying "he told me he lost respect of you cuz you called him stupid. careful there, he is the son of a general and his mother is a lawyer, he could destroy you over something like this."

he promise to talk and convince him to not make things worse. but i must promise never joke or reacts to him again.

who in fault here? i mean if i step on boundary just tell me and i will apologize, making unnecessary dramas like this incite rumors and gossips among the group and often it would break the circle like OFTENLY. this is the first time. am i the bad guy??