The author seems to have a clear bias that radical == good, and this puts me off. Radical action can be good, and it can be bad. Mindfulness can help us see which case is which.
It doesn't sound like the author has done any mindfulness practice
If it helps one activist and million corporate drones and people looking for status quo, the practice is not on the whole a friend of activism. So what are the numbers?
Perhaps a study on how many activists quit when using or not using mindfulness techniques. Though the confounder is huge, people trying this have some sort of a psychological problem most of the time...
Good walk for two-three hours would do better than mindfullness session.
(hint: after about 25-40 minutes of intensive walking you start to burn fat primarily; this process has a side effect of endocannabinoids' release [1]; you get healthier and get high at same time; I am not including here release of brain-derived neurotrophic factor for you to discover it and effects of BDNF serum level increase on the mental state and thinking)