Also, it's important to mention that the academic boycott if Israeli institutions is an important component of the BDS movement. A general boycott is necessary because there is a moral imperative to end the occupation and only outside pressure, like the pressure that was exerted on the apartheid regime in South Africa, can perhaps achieve this.
Why academia? Because Israeli academia is also a mouthpiece of the establishment and is used to enable Israel to present itself abroad as "the only democracy in the Middle East."