"The guys trying to blow up your car, shoot you on the beach, ... are deffo bad guys."
So the US soldiers in their diverse wars, the drone operators, and those covert CIA operatives are always bad guys? They did a lot more blowing up and shooting up than the opposition ever managed. But then, so were the soldiers fighting Nazi Germany. And Hitler himself would not be caught by your definition, he only gave orders.
Sometimes people fight for some greater good (democracy versus fascism), sometimes they fight for survival (Assad), sometimes they fight for a badly defined concept (war on terror). To figure out who is on the right side is not simple and some poor fellow fighting for freedom in the middle east has the same chances for being right or wrong as you do. But he probably put some more thought into this than you did -- because he decided to risk his own life in the fight.
Let me close with a citation from Steven Weinberg: “With or without religion, you would have good people doing good things and evil people doing evil things. But for good people to do evil things, that takes religion.” I think religion should be replaced with 'belief' to also catch the evil committed in the name of Fascism, Communism, and Capitalism. Keep that in mind when you vote for the next Believer in the oval office.