Joe Stack's adult daughter, Samantha Bell, tells ABC's "Good Morning America" the plane attack was "inappropriate." But she praised his anti-government and anti-tax views.
Asked if he considered her father a hero, she said "yes." She spoke in a telephone interview from Norway, where she lives.
Bell says her father was not a hero for taking a life, but "because now maybe people will listen."
Authorities say the 53-year-old Stack targeted the IRS office building in Austin last week, killing employee Vernon Hunter and himself, after posting a ranting manifesto against the agency.
Hunter's son, Ken Hunter, says he's alarmed by comments that called the pilot a hero.