>I have seen the homeless as people to be pitied and helped. Just weak people, down on their luck.

They are. They also tend to have high rates of mental illness, which often is what leads them to live transient lives. Leaving them in your hallway unsupervised, though well intentioned, isn't the way to help them. It didn't backfire because people are assholes, it backfired because you operated on a faulty understanding of the situation