If people decide the homeless are likely to be dangerous their propensity to help them, via money or food or a place to stay or a ride somewhere will plummet to

If people decide the homeless are likely to be dangerous their propensity to help them, via money or food or a place to stay or a ride somewhere will plummet to near-zero. Letting assault-prone people walk free because they're mentally ill is a threat to both the normal citizenry and the well-being of the homeless at large. Not to mention the fact that dangerous homeless are much more likely to injure or kill another homeless or otherwise-vulnerable person.