@RonJohn
It's pretty simple. Protesters think the legal justice system is biased / racist as is the government / nation as a whole (both historically and currently to a large degree). Thus they are protesting these perceived injustices by protesting / denouncing the symbols of our country, our flag and national anthem.
Those that find this offensive do so for several reasons (differing to degrees but for the most part I believe in agreement overall). I'll speak to what many I've discussed this with are in agreement on. Most of us take pride in our country, focusing on the positives while not forgetting the shortcomings. Most recognize our flag and anthem to be symbols of our nation as a whole. Most recognize and appreciate the sacrifices our veterans have made to our nation. We hold with solemn regard the soldiers, sailors, airmen, and marines who gave the ultimate sacrifice to protect our nation, citizens, and freedoms. Most regard the perceived denunciation of these symbols as a denunciation of our nation as a whole and a denunciation or dismissal of the sacrifices made by our veterans. Too many have lost loved ones in these endeavors. So it is quite personal for them. Most are thus offended by the "protests" for these reasons.
I've never respected anyone who failed to stand for or remove their hat during the national anthem. I don't respect it but I recognize their right to do so (or not do so).
I think any representative of Tech should understand their actions reflect upon the institute. And should thus be held to certain standards of decency while representing same. If Tech administration disagrees that is their decision. I will have my own to make.