The SCOTUS disagrees with you. In Texas vs. Johnson the court narrowly decided that:
The court found that, "Under the circumstances, Johnson's burning of the flag constituted expressive conduct, permitting him to invoke the First Amendment... Occurring as it did at the end of a demonstration coinciding with the Republican National Convention, the expressive, overtly political nature of the conduct was both intentional and overwhelmingly apparent." The court concluded that, while "the government generally has a freer hand in restricting expressive conduct than it has in restricting the written or spoken word," it may not "proscribe particular conduct because it has expressive elements."
Texas v. Johnson - Wikipedia, the free encyclopedia
Im not denying that it is a constitutionally guaranteed right to burn a flag. I am stating that MANY people (lets start with...oh...I dont know...the people at the LUS campus cited in the OP) see it as more than 'just' a freedom of speech issue. I cant imagine very many people that are actually stupid enough to believe that it doesnt cause extremes of response in people. Its more than just a freedom of speech.
Freedom of speech: "Say/do what you want until I'm offended, then stop".
You choose to be offended by something. If you're offended by flag burning then don't take part in it. If you're offended by porn then don't watch it. If you're offended by curse words don't attend a sports event or go to a bar on a Friday night. Or, better yet, find out why it is so offensive to you and work out a way to avoid feeling so offended. Try rationalizing. Is the man burning that flag simultaneously telling you that the flag is symbolic of you, and f**k you? Is it necessary that two consenting adults who chose to screw on film be offensive to you? Why? Does it affect your life in any way?
"I don't agree with what you say, but I will defend to the death your right to say it". To me, that's what the first amendment is about. Without the freedom to say and do as we please under the first amendment we would not be able to offer dissent against government policy, foreign influence, etc. We need it to make sure our desires are heard. Sometimes it's superfulous and unnecessary, but it's amazing that we can do it.
"Hmmm...Can't decide if I want to watch "Four Houses" or give myself an Icy Hot pee hole enema..." - Blake Shelton
Again...no one is saying it isnt a constitutionaly protected act. Just dont be stupid enough to think you can do it in front of anyone other than a bunch of like minded assholes and idiots and expect it to NOT have consequences. That is all.