Well, this one is very good!
Check out the site at Viet Nam Vets Against Kerry. And if you still think that only these vets feel betrayed by John Kerry, you can check out these other sites:
Vets Against Kerry
Viet Nam Special Forces Against Kerry
John Kerry...War Hero?
Viet Nam Vets Against John Kerry
POW MIA Families Against John Kerry
A Google search will produce 100s more.