What is the ruling on working for companies like Coca-Cola and Nestlé, and how accurate is the claim of their contribution to supporting the Zionist entity?

The extent to which the aforementioned company supports the Zionist entity is unknown. The default rule is the permissibility of dealing with non-Muslims, except in matters that aid them in warring against Muslims. Al-Bukhari titled a chapter "Chapter on Buying and Selling with Polytheists and People of War" and mentioned the Hadith of the Prophet, peace and blessings be upon him, buying a sheep from a polytheist. It is permissible to buy and sell with all disbelievers, except for people of war, from whom nothing that they would use to destroy Muslims should be sold. Even if the company's support for the Zionists were proven, working for it is not forbidden if the work itself is permissible, but it is better to avoid it.