Use the Straw Man Tactic to Ease the Blow When Giving Criticism  

In an argument, the “straw man” tactic is used to set up a poor representation of your opponent’s opinion and attack that to undermine them. It’s a pretty crappy way to have an argument. If you’re trying to give constructive criticism, however, you can use it to help avoid hurt feelings.

Source: http://lifehacker.com/use-the-straw-man-tactic-to-ease-the-blow-when-giving-c-1725021276