Well, actually there are two reasons.
The first is because they refuse to cower and shut up. They refuse to Celebrate (Sexual) Diversity.
The second is this:
"The threat of the Robertsons isn’t in Phil’s politically incorrect
comments. The threat is that this family has figured out how right-wing
politics and Evangelical Christianity can influence pop culture without
being the punch line or the bad guy. While the left has spent decades
making conservatives look like idiots and Christians look like bigots,
Duck Dynasty reminds average Americans that these views are mainstream.
"The left is alerted but will those on the right take advantage of what
the Robertsons have created?"