My son is a veteran. He is homeless unless I allow him to live with me. He is an alcoholic who has given up on life. Tried rehab did not work . He is 39. I am 68, I need him out of my home, my health depends on it. Where can he go if he is homeless once he leaves my home. He has lost his job, his apartment, everything. I can not take this verable abuse to me any longer. I am beginning to fear for my safety. Where can I go for help for him. My neighbors are all ready to force me to move because of him. I can not lose my home because of his addictions. Please help me. I do not want to throw him out into the cold, but I need him out somewhere he can be safe.

There are many homeless shelters, many are religious based, some not, the most of the local pastors, local social workers can get you a list.

What about the VA Hospitals? Try to get him into their addictions unit for treatment, and they (VA) may also be able to offer some guidance on housing.
Call the police if he is causing disturbance in the neighborhood. That might even speed up his entry into the VA system in light of the fact that VA services are badly backed up in many areas. All American Legion Units have specialists available to help with interactions at VA. Not sure if the vet has to be a member or not. Union Rescue Missions also can be helpful in these situations. By the way, how do neighbors go about forcing someone to move?
What situation are you in that could cause that? HOA? Senior housing of some type?
Lastly, consider the fact that alcohol and drugs cause many deaths at early ages and I don't want to add to your problems but try to handle this in a manner that will not cause you to live your remaining years second guessing yourself and wondering if you could have done all this differently. If you just find him a bed somewhere and he can continue drinking and is not professionally treated, he will not be safe.