Protester, What would you do??
You or your loved one is very ill, sick, hurt...etc. and they call 911 to be rushed to the hospital only to be stopped on the road/highway by protester. During this time, you or your loved one has died in the back of the ambulance cause of lack of treatment and not being able to reach their destination. Who are you going to protest against then?
Honestly, there is a time and place for everything. I'm not saying it's not needed or it should stop but at the end of the day you (and only you) are responsible for your own actions.