Listening to the views of others and gaining a perspective on both sides of an argument is what a good judge should do. Interested parties of all stripes, from the John Birchers to the ACLU, can file an amicus brief with the court. No one seems to have a problem with that.
I think there are a lot of people here reading WAY too much into this. The Supreme Court is well within its right to take into consideration any perspectives and opinions it might deem appropriate. In fact, it's quite prudent of them to do so.