Your ignorance on the matter doesn't change the SCOTUS decision, which ruled in favor of Johnson that flag burning was protected speech:
The majority of the Court, according to Justice William Brennan, agreed with Johnson and held that flag burning constitutes a form of "symbolic speech" that is protected by the First Amendment. The majority noted that freedom of speech protects actions that society may find very offensive, but society's outrage alone is not justification for suppressing free speech.
http://www.uscourts.gov/educational...vities/facts-and-case-summary-texas-v-johnson
That's from the actual reasoning behind the ruling, as noted in the link above. Speech is not just spoken or written words, it includes "expressive content."
In the future please add to existing threads, such as the US elections thread or US politics thread, rather then starting a new thread for each tweet or video you come across. It's easier to keep track of things that way and helps control both clutter and discussions.
Both of these can accommodate items like this without needing to start a new thread for each miscellaneous news bit.
https://defence.pk/threads/us-presidential-elections-2016-news-and-views.374363/page-240
https://defence.pk/threads/american-politics-news-and-discussions.323200/page-3