Yep, I know it's a personal decision, but it sounds like you are fighting a losing battle if you can't even rally Police support.

Get out, take the loss, consider moving to another area entirely and getting a different job. You never know, the job might pay better, the costs of living be lower, and safety monumentally higher if you move.

Oh, and you could always band with neighbors and file a class action suit against city hall. It sounds like their decisions have not only put you in jeapardy, but have also lowered your home value. I'm not one for lawsuits, but if enough folks ban together and you get outlying neighborhoods who are next on the hitlist to join in and get local media coverage, things might change. If you remove the government assistance and welfare programs, it's amazing how quickly bad elements can dry up and move on to their next free meal ticket.