Gandhi's quotes on this matter are worth remembering:
"My non-violence does not admit of running away from danger and leaving dear ones unprotected. Between violence and cowardly flight, I can only prefer violence to cowardice....non-violence is the summit of bravery."
"Non-violence cannot be taught to a person who fears to die and has no power of resistance."
"For I cannot in any case tolerate cowardice. Let no one say when I am gone that I taught the people to be cowards...I would far rather that you died bravely dealing a blow and receiving a blow than died in abject terror...fleeing from battle is cowardice and unworthy of a warrior...cowardice is worse than violence because cowards can never be non-violent."
I think many causes are worth dying for. I think no cause is worth killing for. And I don't think I should ever get to be the one who tells other people they have to die for my cause.