Cuba will probably become the Syndacalist 'cause celebre' and ITTL the embargo will look pretty much as a very petty move by the americans than a legitimate measure. This USA will be a lot different from our as two very definig experience will probably not exist there, i mean the Cuban Crisis and the Vietnam War (unless there will be some analog); also important, no MacNamara as secretary of defence...and i know a website where this will considered a fair exchange with the second holocaust and the mess in China and this can mean that missiles will not take the place of bombers (also because seem that the missiles technologies are a little beyond OTL) and theoretically many programs shelved OTL will be kept as the presidential authoritazion to the field commander to use nuclear weapons in autonomy and naturally the strategy of first-strike and massive retaliation (i said theoretically because while MacNamara take the 'blame' for all that changes, it's was clear that there many that thoughts were needed and so they can still be implemented)
The presence of the Syndacalist party present a lot of changes for the internal politcs of Western Europe and we will probably see some various version of syndacalism as the one developed in nation like Cuba will be very different from what the experience in a country like Italy will produce (it's very probable that Berlinguer will say much much earlier that he stand behind NATO...as while in theory also opposing to the capitalist, the forces of the Warsaw Pact will be seen as a much much more greater menace and i not even consider the religioius nutjub around the world.)
For Italy between the division of Austria (and the western part become a federal state of Germany) and so greatly weakening the local german community (i expect that many will not return unlike OTL), plus i doubt that Germany will be so eager to give political aide to the terrorist due to 'various' reason and the extreme division of the left that can allow in the end some real alternance between the coalition led by DC and the coalition led by the Partito Indipendente Sindacalista Italiano (PISI...just to differentiate from the PSI aka the Partito Socialista Italiano)...basically the 'Years of Lead' can be butterflyed away or at least appear in a much much lessened form.
Israel, well i expect that she will try to enter the EEC/EDC as a form of economic grown and military reassurance as, thanks to the butterflies, they remain an Anglo-French aligned nation and with the second holocaust still fresh even De Gaulle can't throw them to the wolf.