Ever since my baby was born I've not spoken with my in-laws a single time! What do you think about that?
What happened to make you stop talking to them?
I hate them because they belittled me in front of my family
They sound like they're not great in-laws. But it's good to try to keep a cordial relationship with your in-laws, especially if children are involved. Having grandparents is good for kids.
I don't want to make any conciliatory gestures to them.
While it isn't my business, I do believe that it is important for your baby to have as much family around them as possible. Maintaining a good healthy relationship with your in-laws could be important for the growth and happiness of your child.