SALT LAKE CITY – Like millions of other Americans in the 1950s and ’60s, Duane Ruth-Heffelbower spent his formative years learning to tie knots, build campfires and pitch tents with the Boy Scouts, whose wholesome, God-fearing reputation was burnished by Normal Rockwell’s magazine-cover paintings of fresh-faced Scouts, brave, courteous and cheerful. Although he’s no longer involved in Scouting, the 70-year-old Mennonite minister from Fresno, California, has followed the slow deterioration of the Boy Scouts of America from afar and cringes to think what this week’s bankruptcy filing over a blizzard of sex-abuse lawsuits might mean for an organization already grappling with a steep decline in membership. “It’s really sad.