What US-backed Israel is doing is utterly abhorrent, and protesting makes sense; I can understand why an employee wouldn't want to aid them in any way - but with oil and gas off the coast of Northern Gaza, the US about to build a port for it, and the US, UK, France and Germany govs supporting Israel to the hilt, real sanctions are not going to happen. Hell, the west is still supplying Israel with weapons, and Israel hasn't even been kicked out of EuroVision!

But... one person disrupting a meeting will have limited effect, and is guaranteed to result in a firing.

IMO a better plan would have been a petition, signed by as many employees as possible. Failing that, looking at strike action through union(s) could be a good idea. A single employee has very little power - but if a significant number banded together, their power is much greater.