The dissenting judge ruled the father as a private figure, and thus not subject to this type of speech (dunno if it says that in the article, I didn't read it).
The Westboro Baptist Church are just a big family of lawyers, and they are good lawyers. They use hateful speech to win lawsuits and make money.
The ruling was the correct one. Limiting free speech just because they are a bunch of assholes isn't right.
That being said, they are hated by pretty much everyone. I'm sure that we are all willing to turn around as a group of pissed off family members with dead children beat the piss out of them.