Fast the entire day, as in a true dry fast with no liquids either. No substances, you must remain sober. Watch the entire 7 hour movie of Sátántangó twice in a row. You may only use the bathroom before the movie or after the movie, not during it. Try to get deeply engrossed in the movie so you can cry, and only that be used to tease your actual thirst. And no masturbating, most importantly.
And only then can you feel a fraction of the pain of Palestinians.
And I am dead serious.