New York (CNN) -- The mother of one of the two New Jersey men arrested last week at a New York airport allegedly on their way to fight with an al Qaeda-affiliated group in Somalia says the two men are guilty of stupidity -- but not of the sinister plan described by authorities. 

"Anything makes him angry. But he's not a terrorist; he's a stupid kid," Nadia Alessa said of her U.S.-born son, Mahmood. 

Mohamed Mahmood Alessa, 20, of North Bergen, New Jersey, and Carlos Eduardo Almonte, 24, of Elmwood Park, New Jersey, are charged with one count each of conspiracy to kill, maim and murder persons outside of the United States, which carries a maximum sentence of life in prison. 

The men, who were taken into custody at John F. Kennedy International Airport on June 5, intended to take separate flights to Egypt on their way to Somalia "to join designated foreign terrorist organization Al-Shabaab and wage violent jihad," according to federal prosecutors. 

The criminal complaint filed in U.S. District Court in Newark alleges that in 2007, Alessa and Almonte traveled together to Jordan, where they intended to enter Iraq to commit violence against U.S. troops there. 

Nadia Alessa told CNN that her son went to 16 or 17 psychiatrists for what she called "anger management issues" that surfaced when he was a boy. He lived at his parents well-kept home, where his angry outbursts were common. 

However, she said, he wasn't particularly religious. "He slept late. If he was devout, he would make his prayers on time. He didn't," she said. 
Were his parents divorced?
 He lived at his parents well-kept home,