Snoop Dogg wasn’t impressed with David Irving’s decision to quit playing for the Dallas Cowboys. The 25-year old Compton native “retired” in an effort to protest the NFL’s anti-marijuana ban earlier this month. Despite Tha Doggfather’s long, long history of supporting weed in all its forms, Snoop believes Irving is setting a bad example. During a call-in interview with ESPN’s Stephen A. Smith, he proclaimed, “Athletes aren’t …