Why Does ANYONE Need to Stockpille Assault Weapons and Stockpile AMMO for these Assault Weapons?

Adam Lanza's mom was a substitute teacher. She loved her son very much. Yes, there were struggles. Her husband did not stand by her. Instead divorced her. She did not always believe in the school system for her son. Instead she often home schooled him.

Where I question her was her belief in the "end of the world" theories, her stock piling of guns and her taking her son (with issues) out for target practices. That is the part I don't understand. I do not like guns. I don't believe anyone should stock pile guns, especially assault weapons and 100 rounds of assault weapons ammo. Why would anyone do that? That is the question.

Why Does ANYONE Need to Stockpille Assault Weapons and Stockpile AMMO for these Assault Weapons?

Breaking News: Immigration Center Attacked! Fox News says 15 Dead, 26 Wounded

The American Civic Association in Binghamton, NY came under attack today. The association describes itself as helping immigrants and refugees with counseling, resettlement, citizenship, family reunification and translators.

Reports said two gunmen backed their car to block the side/back exit of the building at 10:30 am ET. They stormed into the center and began their terror attack. According to police reports, more than 41 hostages were in the building — 15 in a closet and 26 in the boiler room. Sharp shooters from the Binghamton SWAT team were poised outside the building at 131 Front Street. The Endicott police bomb squad was also at the scene.

Fox News reported the siege ended about 2:00 ET with at least 13 - 15 dead and over 20 wounded.

Latest reports say two people have been taken from the American Civic Association with their hands cuffed behind their back are witnesses, not suspects. Fox is reporting the police are requesting a Vietnamese translator for the witnesses. The police will conduct a news conference at 4:30ET. Now Fox confirmed: The lone gunman shot himself. The gunman, Jiverly Voong, held dozens of people hostage for several hours before shooting himself to death, police said.
AP Reports:
The gunman had recently been let go from IBM in Johnson City, said Rep. Maurice Hinchey, whose district includes Binghamton. The gunman opened fire on a citizenship class, he said. "People were there in the process of being tested for their citizenship," Hinchey said in a telephone interview. "It was in the middle of a test. He just went in and opened fire."
Update - Yahoo news:
BINGHAMTON, N.Y. – The man who police say killed 13 people in a shooting rampage at an immigrant community center was depressed and angry over losing his job and about his poor English skills, friends and officials said Saturday. The gunman, believed to be 42-year-old Vietnamese immigrant Jiverly Voong, had been complaining that he couldn't find work and that his unemployment checks were only $200 a week, a friend told The Associated Press on Saturday.
Hue Huynh, a Binghamton grocery store proprietor whose husband worked with Voong years ago, said the man had driven a truck in California before recently returning to Binghamton, then losing a job there.
"He's upset he don't have a job here. He come back and want to work," she said. Her husband tried to cheer him by telling him he was still young and there was plenty of time to find work, but he complained about his "bad luck," she said.
Reference:
Shooting at American Civic Association and Fox Cable News