Everytime I'm at a demonstration with a lot of police violence like lots of Palestine demonstration I get very nervous, my heart starts racing, my knees get weak and my breath becomes short. I even get it when watching videos of police violence or when I see SWAT team busses outside of demonstrations. I'm not the only one that feels that way but others that I see at every demonstration deal with it better, I feel like. They can get in the zone better. So do you have tips?
Everyone gets at least a little bit of nerves.
Try to remember that you're surrounded by people who will render help if something happens, and any injuries sustained will heal in time.
There's not really "good" advice to give, because everyone's different. Take some time to find something that works for you whether that's a pre-protest warmup, meditation before or after, breathing exercises, ideological or philosophical motivation, etc. Something is going to help you slow your heart rate and keep your head about you.
This just isn't true, that shit can be permanent depending on what it is.