Boycotts like this do nothing to change the politics in Israel though. It's just a way to make people to feel they're doing something. There's nothing wrong with that but in terms of political effectivness it's pretty sterile. My dad used to boycot Israeli and South African products. I'd take the mick because back in the 70s and 80s the only stuff to come out of those countries were Jaffa oranges and the occasional tin of fruit, so boycotting them was a piece of piss. Israel is still easy for people to exclude without really having to do much. To maintain any kind of consistency you'd need to boycott the US too, but that'd impact on people's computers and smartphones which is a completely different proposal.
If I were to boycott states whose regimes stink, China, Iran and Russia would top that list, closely followed by the rest of the arab states and pretty much any country with "stan" on the end of its name. And that's without considering African states like Chad, Guinea, and Burundi.