The only reason they wore their disguises was so they couldn’t be charged. Its what Israelis have always done. They used Australian passports in Dubai. Israel has normalized assassination in the eyes of the world. If Russians do it or North Koreans its front page news for weeks.

When Israeli forces invaded a Jenin hospital dressed in medical outfits and killed three Palestinians, they probably violated laws against perfidy and executing protected individuals.

Source: Here Are the Laws Plausibly Broken by Israel in Its Raid on a West Bank Hospital