The path of history is shaped by warfare, and war is decidedly violent. With the use of explosive devices, it is often a random violence, so it's not a matter of selection. Whether a highly principled, well-motivated individual or a self-serving coward, there's no "merit system" involved; if you commit (or are committed) to war, you are at risk. Whether combatant or noncombatant, only the most sophisticated weapons technology or a selective approach (e.g., a sniper) allow us to discriminate.
We observe that those circumstances, abuses or injustices that have developed in history have had to be addressed by war, so there are legitimate reasons for conflict. I haven't seen the movie, so I haven't heard the statement in context, but I have to agree with the statement.