Should I confront in laws?

So I got in-law issues. My boyfriend was not on board for this baby but I’m 3 years older than him, approaching my 40s. We’ve been together for 5 years and I told him I didn’t want to wait more than 2 years before having a baby but because I loved him I gave him more than 2 years to think about it. Then in 2018, I told him if he can’t tell me when we gonna have a baby, he needs to let me go. He accepted, although not on board fully with it and decided to see a therapist to work on his childhood trauma issues.

Now, his brother and his wife, whom my boyfriend despise btw, are all over this baby. Cool no issues. But they are the worst fear mongering people ever. They keep sending him messages about how he is never gonna sleep anymore and end up broke, with no life on his own. Then they had a fight because my boyfriend was not acknowledging some abuse that the brother experienced at the hand of the parents. Now, my boyfriend is gone crazy again talking about how his life is hard, that it’s gonna get hard for us, etc. Completely depressed and not speaking to me. We were doing so good. Now I’m depressed, sad too and feel rejected.

My question is should I reach out to the brother and his wife to tell them to leave him alone or should I let my boyfriend deal with this since it’s his family and I should not get in between? Thanks ladies