The history of harassment, Palestine, and israel is largely irrelevant.
If a law prescribes (proscribes?) specific phrases regadless of intent and context, they should be chosen very, very carefully.
Im not an expert, but i think other states require a context like "intended to incite hatred".
By prescribing this particular phrase, even if you are correct, it allows harassment to portray Palestine as ignored and persecuted - the very intention of terrorism.