if there no law there should be a law anybody vandalizing Israeli flags will get a heavy prison sentence

Wow! I interpret that to mean that someone is unhappy living in Israel. Perhaps several someones. Okay, then. Find him, or them, and throw them out of the country -- never to return. I hope they find happiness in an Islamic paradise -- Iran, perhaps? No, they persecute Arabs there. Perhaps Syria, or Saudi Arabia.

before the law of this liberal democratic and sovereign nation-state of the Jewish people, and they spit at us. Sadly, such acts are then translated to "tag mekhir" (price tag) actions of vandalism against Arabs. Yet, in non-liberal democracies that surround us such acts wouldn't take place, for two reasons: 1) The countries have already been "cleansed" of their former Jewish population. 2) Such acts would translate to years in prisons.

I expect the US State Department to condemn this action, Ofir Pines to liken it to Nazism, and Netanyahu to ask the Shabak to investigate.

Too bad you lost all six wars you started, isn't it? But you should feel free to leave the State of Israel at any time. You have 21 Arab states to choose from, plus Gaza. With all that available to you, why would you want to stay in a land that was never yours to begin with?