freedom fighter 
noun
A person who takes part in a revolutionary struggle to achieve a political goal, especially in order to overthrow their government.There are still those who profess not to know the difference between a terrorist and a freedom fighter....
- Your terrorist is my freedom fighter, your defenders are my oppressors - reverse them and apply as you will.
- The trouble with being an international terrorist, freedom fighter or revolutionary is the puzzle of what to do with yourself once the glorious struggle is over.