@Carlos Lez If I were you, I would cease all direct communications & interactions with this tenant (of course, keep records of any messages they send). Instead, the appropriate response would be to direct them to only communicate with your attorney. A landlord attorney is especially important in this case, since as you already know, landlord-tenant laws in the Bay Area are some of the most convoluted & strict in the nation - especially w/the moratoriums. Tenants have endless (usually pro-bono) legal resources, so I'd recommend getting a landlord attorney, especially based on the fact that this unwarranted tenant is already lodging formal complaints against you/playing the racism card. If you need some referrals, just send me a PM.
Correct me if I'm wrong, but it seems like you've already accepted rent from this tenant, since he has been paying from his unemployment? This is an important distinction that your attorney will certainly bring up, as you may have inadvertently elevated him from an unwarranted subtenant to a co-tenant. There's a lot of nuances to which path of action is best for you that only an experienced landlord attorney can shed.
Disclaimer: Not an attorney, just my two cents based on my real estate experience in dealing w/tenants & landlords in the Bay Area.