Mental illness is illness.

Anyone can become ill at any time and if an illness were to make you a risk to the life and limb of someone else you may need to be isolated from other people while receiving remedial care (which is something you can’t just leave to personal insurance to fund).
But at all times you treat the person with the illness with all the care and respect you would hope to expect if you or your child or parent was ill.

Health is a spectrum we all sit on.
Some of us are overweight, some of us have heart problems or breathing problems, some of us have cancer or infections. Some of us have poor mental health or one of a variety of mental illnesses or conditions.

So called ‘Anti-Political Correctness’ is being used by some as an excuse to be vile, rude and intolerant often to the most vulnerable people.
There is a history of this sort of thing. https://www.mentalhealth.org.uk/blog/holocaust-memorial-day-remembering-psychiatric-patients-who-were-victims-nazi-persecution