In-laws give priority to relatives and society

It’s been 2 years now but it still doesn’t get out of my head how my son was made feel that he didn’t mattered.
My husband married me against my in-laws wishes, they wanted a girl from financially wealthy family, but due to my husband strong stand they had to say yes for marriage, but they didn’t even bother to stay around us during celebration, didn’t click any pic or nothing. Ok that’s understandable that I’m not their choice.
After marriage we moved to abroad in couple of weeks., and everything was good.. I conceived child (my MIL had given many reasons to my husband to not marry me, and one of it was infertility runs in my family so I can never become mom) and we shared good news with in-laws but they started talking negatively.. like u never know if baby will be born alive or not.. we didn’t understand how much they hate us.. we were very innocent and used to share everything with them, we kept sharing and after my delivery in couple of months we decided to go to India and live at in-laws as we had our bedroom there.. my husband had told many times we are coming but one relatives family had occupied our space and my in-laws fought with my husband and asked him to adjust somewhere in store room as relative will not move.. I was shocked to know how someone can give priority to relatives over own son and grandkid ??
After that we went very low contact with them and very rare visit but the started spreading false news about us that we don’t show baby to them.. and whole of the community started ghosting us, giving death stares and what not.. we were so isolated, no relatives from his side visited us..
and they lied so much.. I never knew that someone who shows themselves as religious can lie to such a low level ? I honestly lost all respect for them..
but I still can’t let it go how they sidelined my child.. how they made him and us feel less important.. my husband was hurted a lot by how his parents treated us.