Am I wrong for putting a curse on my Ex’s baby?

Just as a cold open, I am Totally ready for people to say this is fake/ AI generated because it sounds insane. Also yes, brand new account. I have lurked for almost 10 years but never felt compelled to make an account till now

I (31F) dated my ex, Ewen (30M), for almost ten years. We were high school sweethearts, knew each other since 5th grade, I was SUPER close with his family (especially his mom) , we traveled internationally together, all the great long term relationship goals. Nothing felt unstable or dramatic or weird except Ewen had a female best friend named Liz. Liz honestly never bothered me, I know this can be a topic of controversy, but I have close male friends too, and our friend group has always considered not letting your significant other hang out with people of the opposite gender to be very weird and controlling (which I still agree with) , so we had a conversation or two about it and beyond that I completely thought we were fine.

But then, about two years ago after years of talking TO ME about marriage and kids, he sits me down and tells me Liz had confessed she loved him and that he “had to give it a chance” or he would regret/ might not forgive me. I was completely blindsided and pretty fucking heartbroken. The breakup fight after was emotional and messy (on my part mostly, straight up I was a monster. I broke a lot of MY own shit, but I was still throwing things and he was just crying) and on my way out I said something awful (it’s been two years so I can’t even remember exactly what I said, but) along the lines of “and I also hope any future kids stuck with you selfish assholes as parents fall to the curse you deserve.“ It was a line I remembered from a Tumblr post from high school, definitely not my proudest moment, but I was angry and trying to say the MOST hurtful thing I could think of. even so, I am not remotely superstitious, I don’t believe in gods, spirits, curses, luck, karma, or aliens, it was just rage talking, absolutely no intent behind the comment.

after that fight and me getting my shit, I blocked him/his family, move on, and eventually started law school in another state, so assumed I’d never hear from his cheating ass again and the drama was over.

However, Ewen and Liz got married after a very short engagement, and they recently had a baby after what I’m told was a very difficult pregnancy. The child was born extremely ill with something called phifer disease. Through a mutual friend (that I hadn’t thought to block on steam of all things), they are trying to contact because they apparently believe my shitty comment caused this. After this “friend” reached out I spoke to a handful of other mutuals and it’s not clear if they want to apologize or yell at me.

Now like I genuinely feel awful for them because having a dying child must be so fucking devastating and I would not wish that on anyone no matter how much I hate their guts. But I also feel like OBVIOUSLY there is no universe where I magically caused a genetic condition, and it’s not my responsibility to open myself back up to that hurting anger to assuage their guilt cause they did something fucked up and now unrelatedly they have a baby that’s dying.

I have sympathy, but I really do not want to be pulled into something this insane? but on the other hand this might be their only kid, Liz might be infertile, but that might be a lie I’ve been told to be sympathetic.

So am I wrong for just…ignoring them?