What do you mean by "listen to the Supreme Court"?
The language of Amendment I is crystal clear and does not require interpretation. Any "interpretation" which changes the clear meaning which lacks the concurrence of 2/3 of each House of Congrgess and 3/4 of the states is just meaningless blather.
Congress shall make no law abridging the freedom of speech - fine. Phelps can say anything he wants.
Congress shall make no law abridging the right... of the people peaceably to assemble; and to petition the Government for a redress of grievances - fine. Phelps and his people can peaceably assemble, and they can do so for the purpose of petitioning the government for redress.
The parents of the 9 year old killed in Tucson are not the government. Phelps may not assemble to petition them - for anything.
The trend of USSC decisions which conflate the rights of speech and peaceable assembly to permit riotous "demonstrations" is not in MY constitution, and it's not in yours, either, in your garage or elsewhere.
Any time before 50 years ago, Phelps would have been horsewhipped long since - an outcome perfectly in accord with the Founders, and the Constitution.