You're happy to redefine genocide in a ludicrously expansive fashion but pretend to need clarification about what antisemitic means in this context? I know, you're just asking questions.
"Semitic" is a word that includes both hebrews and arabs, because both are classified as descendants of Shem in the Bible.
Despite that, most people who use the word "antisemitic" apply it only to something that is done against hebrews, and not to something done against arabs.
Therefore it makes sense to request clarification about what someone means by that word, i.e. if they meant that BBC is anti-Israel or it is anti-arabs.
It would be much better if everyone who means that something is anti-Israeli, would say it clearly, instead of using the ambiguous word "antisemitic".
The word "Semitic" has been created due to a misunderstanding of the Bible, because there the classification of the people was not based on real descendance from common ancestors, but it was based on the political dependence of those people at the time when the Book of Genesis was written. Unfortunately, nobody has found a suitable replacement for this word.
(In the Bible, the descendants of Shem were those dominated by Assyro-Babylonia, while the descendants of Ham were those dominated by Egypt, regardless of their true ancestors. For instance the Phoenicians were classified as descendants of Ham and the Hebrews as descendants of Shem, despite being 2 extremely closely related populations, separated by little else except their different religions.)
