Entire in law's family ill treating my family

Hello sir, I have been married for 2.5 year now with a girl baby of 1 year. I dint have much problem till I came to my house for my delivery. At initial stages I started ignoring my mil's insulting talks just to maintain my relationship with my husband. I am the only daughter of my parents. My father passed away wen I was just 9 months old baby. My mom has sacrificed her entire life for my sake. Mine was arranged marriage. I have a younger sister in law whom I treated like my own sister. She was gud with me. Last year she got married and my mil feels her daughter dint get into a well settled family, so she started treating me badly. She kept telling her sisters dat i am very lucky to get such family n her daughter is struggling. When their son in law comes home she started ill treating me. Both my in laws started putting restrictions that I shd not go to visit my mom. My husband was very supportive and he never used to let me down in front of them. My mother in law complained abt me to my sister in law saying I am nt respecting her. Then my sister msgd me in a very rude manner. She used words liked I have nt got the opportunity to see my fathers face and I m such a bad luck girl n I shdnt enter their itseems. When I told all this to my in laws, my mil says she only asked her daughter to speak like this. And these kind of talks continued. Finally me n husband decided to move away separately n lead our lives. He said me to stay with my mom till then. As I am in my mom's place my in laws have brainwashed my husband. They r threatening him that they will die if v move out. My mil started complaining abt me again to all her relatives. When we got to knw this my mom rang up to ask abt this. My fil started using slang language to my mom and started shouting at her. I informed my husband that I will nt have any kind of contact with his parents. So my husband is threatening me saying if I don't go his house he will amid something to himself n I can't c him alive. I am nt able to bear all this kind of mental torture. Please advice on what can be done.