Husband’s mom love to slander and accuse me of outrageous things.. what should I do??

My husband’s mom is very controlling and doesn’t know when to stop, I am a west African and my husband and his family are African American but I’m to believe that his mom might be racist she makes everything into a comparison it’s actually very very sad. She says my family has motives and are scammers and we are leaching on his son and says I have ill intentions for his son lol mind you I come from a family with people that have money or making 6 figures and when i married my husband he had nothing he worked at Starbucks and was a college student he was still living with his mom and I had to move in with them tip 1. NEVER LIVE WITH YOUR IN-LAWS ..then she’ll say Africans do witchcraft and I did voodoo on his that’s why he acts the way he do in front of their whole family which was very unprovoked and humiliating but mind you his son is acting like that because he is fed up on his mom behavior ..she’s the type of person who uses vulnerable life story against you she’ll do something for you and bring it up oh I did this I did that blaze blaze that’s why I never over shared with her cause I’ve seen her do that to people too many times even her own son she’ll talk hella trash about my husband to me which is so eww to me like why are you speaking about your son in such manners then you disrespect your son talking about his problems to everyone which is crazy because that’s humiliating and low .. she speaks ill about me to people she will accuse me of things i never did, make assumptions of everything and worst of all slander my name,character,values and morals what makes it worse is we are Muslim and accusations and slander is a huge sin but anyways I grew up in America I don’t believe in voodoo never did it never crossed my mind and never plan on ever even doing that. She’s so quick to forgive people who done her very dirty and be all cool with them but when it comes to her son or her sons wife it’s beef 4 life -!and will drag on forever She constantly find little ways to cause problems and the sad part is she’ll text my husband and says very uncomfortable things we can be having a good time and soon as she texts him his whole mood changes and the way he treats me completely changes which is unfair to me. I keep praying to Allah and being patient but it’s soooo hard cause Allah knows I have no ill intentions ever for anyone and it’s just so sad she doesn’t know when to stop and doesn’t understand that she’s ruining my marriage big time .. it’s so much more it’s actually crazy she’s say things that are disrespectful, disturbing and distasteful. She thinks she’s better than people she looks down on people she preaches what she doesn’t practice her behavior is just mhm mhm very controlling she wants to control everything his son does sometimes you’ll think she’s the actual wife of his son. She exposes her son’s fault to everyone never guards him she’s very arrogant and ignorant and I hope Allah shows her that this is not life she’s very oppressive she’ll text him things like “she’s just a filler” a filler lol I’m married to this man rightfully putting doubts in his head she’ll say to my husband I’m so disappointed in you why couldn’t you go marry a African American woman but you went to marry a African woman if it was up to her her son would never marry a different culture talks trash about me to my husbands dad.. calls me a bitch to friend, calls her sister and they’ll make up soo much trash talking together . It’s soooo much stuff i could type so much lol it’s sad… but one day in this world or the hereafter everyone will pay…what would you do if you were in my situation… #mortherinlawfromhell