0 - don't hate them at all.. their music is great, I love that they're standing up for LGBT and Same Love has converted some homophobics to people who can at least somewhat tolerate us, their videos are great, Ryan Lewis is an amazing producer and Macklemore has great lyrics and rhythm.
The only thing to possibly hate on is that their music is overplayed now and early hipster fans think they're too mainstream now, but they always happens to popular songs/people.

Not a reason to hate on them.