Meeting with the school over my sons teachers tik Tok. I hope I'm not overreacting

I just want to make sure I'm not overreacting to this. I have 2 boy. One on the 10th grade, one in the 8th. So I will not lie when I say my oldest son was a nightmare. He put teachers through the ringer in middle school. He threw his desk. He called them bitches and fatasses. He said "Go kill yourself". He was a nightmare student. And a lot of that's as him coping with his dad's death. My son had the same pre-algrebra teacher he had and I know he put her through it. My son went to a mental hospital his 9th grade year for anger and tried to committe suicide in there. He's much better his 10th grade year. He's on medication and is doing better. My youngest is the exact opposite. He coped with his dad's death with depression and self harm but he's doing better. He is a very shy and very well behaved kid and he has told me he feels like his prealgebra teacher treats him differently because he's my oldest son's brother and I know my son isn't the issue because he never gets in trouble. So here's the situation. A kid from my sons school found his teachers tik Tok and one video it said "When you finally get rid of that nightmare student" and showed pictures of my oldest son from his year book, his write ups that had his full name on it, and his sophomore picture(middle school and high school are connected). And it says "Then you get their younger brother with my 8th grade son's yearbook picture with his full name". I was livid! Regardless what my son put her through as a teacher there is no excuse blasting a MINOR all over social media. And my 8th grade son hasn't even done anything to act up in her class so that was just for stupid laughs. I went up to the school. The teacher already went home but the principal said he spoke to her and that Tik Tok isdeleted. He did schedule us for a meeting in the morning. I'm so upset and that really hurt my youngest son's feelings. My oldest just laughed and rolled his eyes but my youngest was hurt by that and it was so inappropriate. Even if I had 2 nightmare kids that was beyond wrong of her to blast their full names. Especially when some of her students see her tik Toks