The line "one man's terrorist is another man's freedom fighter" is such a load of horse s***. Terrorism lies in the method, not the goal. Your goal is the liberation of your society? Great. Fight all you want. But don't deliberately target civilians (including children), with the sole purpose of inflicting terror.
The ambiguity comes in the definition of "civilian".
Suppose that you have two otherwise identical countries that are under foreign oppression and the only difference is that in one country the leader of the occupying forces is called a "governor" and has no official military rank and in the other the leader is a "general governor" who is a soldier.
If you go by the view that only soldiers are legitimate targets, then you get the absurd situation where one enemy leader is fair game and the other is not.
I can't draw a clear dividing line between legitimate and illegitimate targets. There are cases that are clearly on either side: attacking children is a big no-no and ambushing the commander of enemy military forces is OK. But I can't come up with a single policy that I could comfortably apply to all cases.
As for the OP, I don't think that I would have grown to be a suicide bomber in any environment. But if I had been born 80 years earlier I might have been one of the "traitors and terrorists" that operated at the time. My great-grandfather was.
My ancestor was one of those people who called themselves "Activists" and whose goal was independent Finland. As far as I know, gread-grandpa's main involvement was that he transported a couple of dozens of young men on their way to Germany to receive military training and he also gave food and shelter to other Activists during their travels.
But some of the Activists went further than that and made terrorist attacks. Though, as terrorists they were quite inept. None of their bomb attacks against Russian administration caused any noticeable damage.
The Activists were also for vigilante justice and wanted to terrorize potential informants into silency. Their actions are a great reason why I'm not fan of people taking law on their own hands: in the general area where my ancestors lived there three supposed snitches were murdered. All well, except that one of them was completely innocent, the second was blackmailed into informing, and only one was really an active participant in the Russian administration's efforts against Activists. Not a great hit rate.