I think that contrary to popular belief, life is not the highest value. It's pretty high up on the list, but there are situations where death is preferable. Either for the sake of oneself, or for the sake of others. People fear death, sure, but in the end, it's just a part of life. Different people handle it differently, but IMO, it's best to accept that it happens, because it does, to everyone, sooner or later. Life is just another thing a person has, important, but not the most important one. There's a whole lot more to living that just not dying.
Normally, death, even if wanted by the deceased, is a sad occurrence, because it means this person is gone from this world, and noone will ever see that person again. Any loss, especially one permanent like that, is very sad. In that case, though, the world has permanently shed one heck of a millstone around it's neck. There's not much of a loss in that case. How sad a death is is inversely proportional to how valuable a person was in life, and I'd say there wasn't a whole lot of value in that guy. While he might have done some positive things regarding minority rights, these are far outweighed by everything WBC has done.
I won't celebrate his death, but because there's little to celebrate. If he changed his views, it'd be worth celebrating, but he died a person as horrible as he was for a long time. A protest at his funeral would be nice as a way to demonstrate the old "Don't do unto others what you don't want done to yourself" rule to the rest of WBC, but nothing more. Perhaps also a chance to catch them on hypocrisy when they complain. I'm a firm believer in that if you do something to another person, you're also giving them implicit permission to do the same to you.
