Am I Overreacting to This? (CW: CSAM mention)

On another sub, I told someone they should use the acronym CSAM instead of saying child pornography or CP.

I got a lot of replies saying "it doesn't matter", basically treating me like I was "uhm actually"-ing the person.

Here's what I originally said, which I didn't think was rude (please note, I'm autistic, so please let me know if it is):

"I'm sorry to be annoying but CP is an outdated term. Please use CSAM instead. I apologize if this comes across as semantic, but it really does matter."

The replies I got, while annoying, didn't really bother me, until I got this one:

"Go fuck your self, its CP, we know what CP is, a semantic label really ain't the fucking issue."

I know it's Reddit, and I know it's the internet, but I can't help but feel a little hurt. I am a CSAM survivor and the discussion of things like this is important to me.

I just don't understand why they had to be so aggressive and rude. I swear, people have no problem being complete jerks to people online just because they're behind a screen.

I'm not the silly username I chose for Reddit, I'm a human being. Am I overreacting to this? Should I not feel a little hurt?