"There's a substantial number of very serious, crippling cases of post-traumatic stress disorder exacerbated, frankly, by what the Army and the Defense Department did in this case," said Rubinstein. "We have a couple of cases in which the soldiers' command accused the soldiers of malingering, and would say things to them that Fort Hood really wasn't so bad, it wasn't combat."
Some of the victims in the lawsuit believe the Army Secretary and others are purposely ignoring their cases out of political correctness.
"These guys play stupid every time they're asked a question about it, they pretend like they have no clue," said Shawn Manning, who was shot six times that day at Fort Hood. Two of the bullets remain in his leg and spine, he said.
"It was no different than an insurgent in Iraq or Afghanistan trying to kill us," said Manning, who was twice deployed to Iraq and had to retire from the military because of his injuries.
An Army review board initially classified Manning's injuries as "combat related," but that finding was later overruled by higher-ups in the Army.
Manning says the "workplace violence" designation has cost him almost $70,000 in benefits that would have been available if his injuries were classified as "combat related."
"Basically, they're treating us like I was downtown and I got hit by a car," he told ABC News.
Pentagon Press Secretary George Little said the Department of Defense is "committed to the highest care of those in our military family."
"Survivors of the incident at Fort Hood are eligible for the same medical benefits as all servicemembers," said Little. "The Department of Defense is also committed to the integrity of the ongoing court martial proceedings of Major Nidal Hasan and for that reason will not at this time further characterize the incident."
Secretary of the Army John McHugh told ABC News he was unaware of any specific complaints from the Fort Hood victims, even though he is a named defendant in the lawsuit filed last November which specifically details the plight of many of them.
"If a soldier feels ignored, then we need to know about it on a case by case basis," McHugh told ABC News. "It is not our intent to have two levels of care for people who are wounded by whatever means in uniform."
On Tuesday, Rep. Wolf took to the floor of the House to urge members to watch the ABC News report, and said Ft. Hood was "clearly a terrorist attack."
"While the Obama administration has designated the attack that killed all those people as workplace violence, the survivors cannot get assistance," said Wolf. "Secretary of Defense Panetta, Chairman of the Joint Chiefs of Staff Dempsey, Attorney General Holder and the President of the United States have failed, failed the people and continue to fail the people that were wounded and killed, and their families at Fort Hood."