Question for the dissenters- why? What's your constitutional rationale?
The Framers' intent has obviously never been to protect all forms of speech. Categories of speech have always been held as deserving varying degrees of constitutional protection, and governmental restrictions on time, place and manner of expressions have been deemed legitimate in many cases. It's not really a stretch to consider than in these circumstances, the manner of the speech (violent, unwarranted insults) and its time and place (a person's funeral) are circumstances exceptional enough to warrant restrictions.
But the place wasn't AT the funeral. It was far enough away that he only saw the tops of signs and didn't even hear the speech until he watched coverage about it on TV after the fact.
Which is why I agree with the concurrence. The actual act of picketing itself was sufficiently removed from the funeral that it itself did not constitute IIED, but as Breyer pointed out the case brought before them dealt with the picketing and did not concern itself with the ancillary activities of Westboro that could have constituted IIED to the Snyder family.