Necroed... Sorry.
Infected rights... Sure... Setting them all on fire... Sure...
Both are valid. But here is a stab for the pro-infected side.
When looking at it, HMHVV is a dangerous and deadly disease. Infected need to feed on metahumanity in one way or another. I sure as hell find the idea of being eaten alive to be terrifying. But after I am dead I could not give much of a crap what happens to that waste product that used to be my body, its just meat without a consciousness inside it.
Now liken HMHVV to other diseases that will seriously mess up life for oneself and possibly others. HIV, AIDS for example. These diseases are a life sentence and even with heavy meds they will still alter your life quite a bit and possibly lead to an early death. Just a few decades ago it was a death sentence to get infected. The disease is infectious, if you're being sloppy its only a matter of time until you ruin another persons life. Would it then have been alright just to burn everyone who contracted HIV/AIDS? I find it unlikely anyone would say yes to this.
Sure, HMHVV is way way worse but both cases can lead to a trail of bodies.
Another example... The chromed up Street Samurai with a potential for cyberpsychosis. Hey, he/she/it could snap at any time and butcher their way through a neighborhood before anyone is able to stop em. Euthanize right away?
What about the awakened with superhuman psychosis... They clearly give no shits for the lives of others. Euthanize?
Head Cases?
Followers of mentor spirits with hot tempers?
Any augmented metahuman is less "human" than someone that is not augmented. And as mentioned, augs might lead to cyberpsychosis or becoming a head case... Hell augs is not even needed to become a head case and its even more virulent than even the Krieger strain.