A Jewish Columbia University student claims he was improperly suspended for discharging two “novelty fart sprays” during a campus anti-Israel rally — arguing the substances were “non-toxic” and his actions were harmless, a lawsuit says. The student, named “John Doe” in court papers, sprayed gag gifts called “Liquid Ass” and “Wet Farts” that he bought on Amazon for $10.99 into the air and not at any particular person during the Jan. 19 protest, the lawsuit, obtained by The Post, claims. “[The] plaintiff’s actions were a harmless expression of speech to demonstrate discontent with the pro-Hamas pro-Palestine message through the use...