I"m not psychiatrist, but having a bipolar parent with 2ndary schitzophrenia, it would be prudent to stay on top of this. The last thing your son needs is to be in an environment where he is being told that gay is bad, especially if he is gay. Not a good thing.
No sense in getting mad at anyone, just demand this be addressed even if you have to go over heads. Your son's health & well-being are the priorities here. As a government worker, I understand being overworked and underpaid. However, I still have a job to do and am required and expected to do it well. I would never allow my personal beliefs to interfere in conducting my job duties or dealing with my employees.
Having a dad with severe disabilities, in and out of the hospital here and there, including nursing homes, it is imperative that you stay involved, sometimes on a daily basis. You must insist on what you feel is right, of course discussing all with medical professionals
before making any rash decisions. But overall, the physical and mental health of your son is the top priority in this issue. This does not appear to be a healthy environment for your son, but you really need to get to the bottom of everything before making any decisions. Good luck, praying for you and your family.