You really don't know about Westboro besides the MSM label do you? They don't follow the Bible at all (not even their own interpertation). They are cultists known as Tachmonites who have their own scripture divided into two categories:
"delectable epics" and
"letters to heretics." The "delectable epics" (the term is the group's) are based loosely on Acts in the New Testament. The epics detail the Tachmonites' various protests against gays, President Bush, Elton John concerts, and the military and portray the Tachmonites alternately as invincible "super heroes" and defenseless victims of brutal rage. Some of the epics are in prose, and some in poetry. They believe Phelps is "the last prophet," with the power to determine who will be damned and who will be saved. They themselves, as followers of Phelps, also have the power to condemn souls to hell.
You should look up their scriptures and read them. It is deeply disturbing. They only put on a 'Christian' mask to the media, it isn't what they follow in their church.