Harrassed by a security

I just came from shoprite now 8:15 and I was harrassed by a Male security ..on my way out he requested to search my bag and I asked when did this start cos I alws buy at shoprite and they never searched my bag before den he said they always do..fine he searched my bag but what frustrated me more is the was a lady behind me and he didn't search her bag I went back to him and asked why didn't he search the lady's bag he gave me lame excuses then I left and he said I was crazy and stupid telling his colleague cos I was just standing outside by the door.