They don't get a "only once" pass under those circumstances.
Maybe if you changed your original post to "Police support throwing grenades..." and not "Police throw grenades..."
When you go out of your way, under oath, to say that your organization systemically didn't learn from the mistake and would absolutely do it again, an "only once" defense doesn't hold any water.
If you said that the Lebanese government was bad because they have all these deadly ammonia nitrate explosions, then it is factually incorrect because there was really only one explosion. Even if the Lebanese government tries to shirk responsibility, or say the explosion was a good thing and they'd do it again - none of that means that all of the sudden there was more than one ammonium nitrate explosion.