Brother in law doesn't acknowledge my toddler

I'm 37, this brother in law is 42. We both married into this family. He is married to my wife's older sister. This bil let's call him J, and his wife let's call her K, are 2 pieces of shit. They have 3 kids (ages 4,7,10) . They rent an apartment and are always moving because they don't pay rent , bil can't hold a steady job. Wife is a stay at home mom who always needs baby sitting because she doesn't want to be a mom, she just wants the title and the FB pictures, but her kids basically live with my MIL. They have both been investigated by CPS, K cheated on J twice, one of the men is a convicted felon... J has been sued multiple times, he conned my Mil and Fil out of money before , and is just a total pos.

Im the opposite. I have no enemies outside of this jerk. I have a great paying career I just got promoted at, a side business, and I'm a very involved dad.

When our son (now age 2.5) was born , he was born early and during winter. He had a 5 day NICU stay. My wife and I wanted to limit visitors for a bit when he first got home from hospital. This POS J and his Wife K, who aren't even fit to parent , started a fight with us over us limiting visitors. It was a very bad fight. After this fight, they continued to start trouble with my wife and I. My wife has 2 other sisters and it is an enmeshed family dynamic. We wound up going NC with the family because of these 2 low lives. Somehow this POS , with all the writing on the wall of who the POS is, managed to convince the family I'm the bad one.

After we were over a year NC with my inlaws, and my son missed out on a relationship with that side of the family his first 1+ of life because of a fight these 2 started, we finally agreed to make up, and my wife's family finally had no choice but to drop the bullshit narrative that I'm the bad one and come to their senses. They wanted me and this BIL to talk it out and make up because they said they don't feel comfortable with me around if I'm feuding with this guy. The entire time we were NC, I was open to trying this, however, my BIL was demanding I apologize to him for the fight he started , and I refused because he has a history of being a narcissist long before this. If I cave and apologize to him, for starting a terrible fight with me, it would only set up for a future of this.

He finally backed down a bit. He had no choice. While he was trying to portray me as this bad man and trouble maker - he had CPS showing up at his house, other neighbors feuding with him, he got sued a couple times, and everything was just coming down for him.

We agreed to make up , but had a discussion on boundaries. We agreed to just be nice to one another and make the effort to re build our relationship and not disrespect one another. We shook hands on it.

I held up my end of the agreement, and every time I saw him at family functions I was always the one to go up to him and his wife and greet them and be polite and friendly to them.

About 6 months after we reconciled, this POS and his wife broke our agreement and things have been off again since, and now I'm never coming back from it. My wife and I were going out annual 4th of July party. We invited them, and my wife's whole family. For some odd reason, this bil and his wife were mad we were hosting a party and they made a big stink over it. Instead of simply coming or not coming, they decided to harass my wife and make a whole family issue that we are some how ruining their tradition on 4th of July. Our party was also for all of our friends and my side of the family. No one was telling them what to do. They could of simply declined to come to our 4th of July party and did whatever they want. Instead they decided to make a stink about our 4th of July party, claim they aren't coming, accuse us of ruining their 4th of July because we had our own party... After all this, they showed up to our 4th of July party anyway lol and when they showed up they ignored me in my own house and were incredibly rude.

I was very angry about this. 2 weeks later, my wife's birthday, J's kids were playing rough with my son and they injured my son twice. J witnessed it but said nothing to his own kids. So I yelled at his son. Later that night J decided to text me that he didn't appreciate me yelling at his son earlier. I proceeded to tell him I didn't appreciate his son's violence towards my son and his lack of parenting..I also told him I didn't appreciate his 4th of July b.s . We wound up having a brief texting argument, and we are now not on speaking terms..

I still acknowledge his kids and am friendly to them..his kids still come to my house still when my MIL comes over. His kids still acknowledge me too. This POS though ? Completely ignores my son..and he will purposely try to show attention to the other kids in front my my son to show her is leaving him out.

I personally don't care too much about him not talking to my son. But it annoys me because of the double standard.I know if I treated his kids this way, the family would have a problem with it..this guy however, the family turns a blind eye to it

My wife has been angry at her parents for allowing this guy over their house despite him not acknowledging our son.