No they're not, with the possible exception of the victim. Marijuana possession should never have been a crime. Of the attackers, one was housed and two apparently homeless. There are violent people among both the housed and homeless, and they're a minority in both cases. I know of no evidence that homeless people are more violent than housed. A few news stories don't prove anything.

On the other hand, the homeless are very vulnerable to attack, from both housed & homeless, since they have no locked doors to protect them. Especially women, who I've heard are "terrified". They are also in danger from disease, due to exposure to the weather and lack off medical care, and die much younger than the housed.