You're not helping by inflicting harm on yourself and those around you. If you want to canvas for the other side, donate, volunteer, great. But these people are obsessed and inflict a lot of damage on themselves for no good purpose.
Most people empathize to those that are infected with a virus. It's often out of their control. You can only offer them help and suggest they touch grass once in a while. But you shouldn't feed into their self delusions that self harm and obsession with things out of their control is healthy and a good way to live their life