It also benefits movements through the radical flank effect. (e.g. when white people saw the Black Panther Party carrying guns to protect their community, MLK Jr’s fairly peaceful sit-ins seemed not that bad in comparison, and when having to make a choice on whether or not to give black people rights, it was easier to justify doing so if the perceived alternative was “black people in the streets with guns”)

In this case, the options then become “buy products that always have random sticky notes and are telling me I’m a bad person” vs “grab the product that doesn’t have the sticky notes”.

If it becomes increasingly annoying to buy products which support Israel because there’s constantly little sticky notes/stickers, people pushing things further back on shelves or flipping products around, etc, then it becomes a lot easier to justify just… not bothering buying the products that are being boycotted. (and it also saves people the hassle of looking up which products are being boycotted, which just makes the lives of anti-Zionists easier)

I would say annoying people is the goal of protest. You make people unconfortable until something changes.

I don’t think you should care

There are ways to be compelling other than annoyance.