The Westboro Baptist "church" organization only talks about hate. This makes this group more like the Ku Klux Klan than a church since every religion teaches love. It makes no logical, ethical or moral or financial sense for this group of people to enjoy a tax exempt status.
They have the right to their opinion and they have the right to peaceful demonstrations as all Americans do but they certainly are not a church.
We need all the tax dollars possible and any organization pretending to be a church should be investigated for tax evasion, starting with this high profile group.