already asked but no one answered

So basically I read a (bl)manga and it had the statement "i can't breathe".See me I'm the person that literally research's everything a specific topic at hand.When the george floyd incident had happened i researched it deeply because i wanted to actually be able to correct ppl with facts when they say george was at fault and the police wasn't wrong(yes believe me i have seen ppl actually saying that with thier soul).So the word "I can't breathe" always resonates with me,like everytime that statement is said or i see it from anywhere(when the context is not related to george floyd) i always take the time to say my prayers for him.I made sure to comment about 4 times(in that statement) that I WAS NOT TRYING TO MAKE A JOKE ABOUT IT I was trying so hard for me to say im not laughing that i forgot to actually state where im coming from.Ppl started calling me insensitive but im not exactly sure why, i feel like its because when i said "im not even laughing im being so serious"(not the exact words i deleted it too quickly) they thought of it like "im not laughing you are" which is not the case i was not laughing and i was actually being serious,Or maybe I'm insensitive because the word came from a bl manga.SO i'm not sure and i would like for someone to explain to me the part I'm wrong at.

PS: I don't think I'm insensitive, I literally made fun of my brother when I was mad at him and after I calmed down i started crying cus i felt so bad.little things literally make me cry