It's like Clinton parsing though, to give illegals that right.
If a lawbreaker is found, he is to be arrested and put to trial. These are all lawbreakers (most of them). They can't have the priority of peaceful assembly over the need to be arrested for their crime. Otherwise, every bank robber would stop running from the police and hold up a protest sign, and the police would have to stop and protect his passage.
Well perhaps the next time the illegals hit the streets to protest President Bush will order the Border Patrol and ICE to arrest them by the thousands at the protest site.
However, I would not hold my breath waiting for such an event to occur.
Until that time they are protected by the First Amendment just like you and I.