No information about Ms. Grande being a lefty. All of the activism references seem to be charitable and public service things for homos, young runaways, etc. She is a big supporter of LGBT crap, of course. But that is about the worst of it from what I have seen on a cursory examination.
She did do an appearance with Madonna and unfortunately may have touched her. Since Madonna is an infamous if well-closeted Satanist, that might help to explain Grande's subsequent bad fortune in regard to current circumstances.
Below is a picture of Madonna wearing what appears to be a replica of a traditional ceremonial robe used by many Satanic cults.