The Westboro Baptist Church does not commit "witch hunts." They are a hate group that protests veteran funerals, Gay rights, and other things they deem hell fire worthy, which is almost everything. Important to note they are NOT involved in any way with the Baptist Church.
Witch hunts are more about finding an enemy the lurks among us, bringing it into light and exposing it, then putting it on trial and sentencing it unjustly. This is identical to terrorism in the way Muslim citizens were treated.
McCarthyism is a great example of witch hunts, many people's lives were destroyed or reputations at stake by the idea of this hidden evil of communism. One of these victims wrote the fictional version of the Salem witch trials known as The Crucible, Arthur Miller.