Don’t blame yourself! This new guy’s reaction is a little bit worrying, like if you just told him something extremely traumatic for you, his first reaction is to make you feel worse about it?
I mean perhaps it’s other people’s (who don’t have similar experiences) naivety and lack of understanding that lead to them saying things that come across as completely lacking in empathy. And maybe in being over sensitive after my own experience, but I’d say it’s a red flag.
Even if he didn’t mean it, but just doesn’t get it, I still don’t think he is the one for you as, if that’s the case, he won’t ever truly get it even if the relationship progresses. And I think you would need someone who does.