Gave up their rights by "illegally" protesting, huh? So basically if you protest the government, and that government says your protest is illegal, you lose your rights. I don't see that being such a healthy path for a free society.
A free society is not one where a few hundred idiots get to take a road trip to the capital and demand they form government. It is not the one where you are free to break any law you choose as long as you label it "protest"
This principle and precedent only seems digestible since the majority is on the side of it. In practice, one can imagine the SAME principle and practice being applied against us and in nefarious ways. It is indeed a slippery slope.