Not ethnicity, just nationality.
Should I go around my city and ask all tourists (both of them) to show me their passports to discriminate them based on their nationality?
Now, you're using whataboutism
It's not whataboutism. I'm not implying that we should ignore what Israel is doing because {put any wrongdoing by the USA, Russia, Palestine, Iran, etc. here}.
I was trying to show, that it is really difficult for an individual to stop the country from going insane, and I refuse to punish random tourists without any proof that they are supporting what their government does.
We went a long way if you consider that it all started because I used a meme format to say that I hate Eurovision. I actually think that banning ANY country from it, would be beneficial for that country.
I fully support your hate to what Israel does I just don't think this will help. I will happily be proven wrong.
Basically dynamite will blow up and spread radioactive dust so one explosion can do additional damage