I don't believe that anyone should feel obligated to stand and sing a song dedicated to a cause for which he does not believe. What I do mind is fake dissent: dissent that is ostensibly promoting one cause (racial injustice) while promoting another (news network ratings). On the other hand, true dissent often carries the most dire of consequences.
Seriously though! Many people are delusional though. If you don't stand to support what they support, you must be disrespecting them or a bad person... yawn