The strikes - whether you agree with them or not and regardless of your political posture - are genuinely seen as militarily preemptive. Israel apparently expected a large Hezbollah attack and tried to get in there first. They “preempted” any such attack. The Guardian employs actual speech marks - so it’s not an opinion but a quote. Newspapers can report what people say, even if the editorial policy is contrary to what gets reported. Linguistically the headli(n)es are correct. (I haven’t taken sides in the Israel-Gaza conflict as I know both sides are currently led by scum who have no qualms about slaughtering innocent people for their own personal gain and have no interest in any meaningful peace.)