From Islamic perspective/ sharia, do we have a duty to stand up and protest against the oppression shown to Palestine, or to shias of Bahrain or the people of Yemen? We follow Ayatullah Sistani but is it a required duty? We live in US and apparently our tax dollars are also being used to kill Yemenis, so what are our obligations regarding this?

Standing for all the oppressed is a religious duty mentioned in many verses and many narrations.