I understand that there is double standard, but you miss out an important factor why the response is different: those missiles work by a different method.
You can see this in action, when Iran shoot their ICBMs some weeks ago, the reaction was similar like Israel's bombings. I have a feeling, that if Israel would nuke Gaza, the reaction of the international community would be much more harsh, but I don't want to give them tips.
I can see this meme is coming from the american teenagers' instance, so I know they deliberately misunderstood this.