Not really. Iran is an existential problem for Israel because of its ability to project force. Cuba is an indirect existential problem for the USA because it might inspire the USA working class to become an existential threat to the oligarchy. These are very different.

From the US spin doctor perspective, possibly. But Israel needs the US 100% focused on West Asia. It’s existential for them

Israel has absolutely no interest in Cuba in any way, shape, or form. If Israel has kompromat on Fetterman, which it doesn’t even need since the guy would do anything they asked him anyway, they’re not going to direct him to go against Cuba unless the US power elite asks them to do it. The USA is still in charge in this relationship. Israel has developed some of its own interests for survival and has to coerce powerful people in the US sometimes, but Israel is not setting the Cuba agenda.