It is not even entirely Hebrew, although because it is overwhelming Hebrew, knowing the Hebrew language is crucial for Jews. The language of Judaism has words from many languages reflecting the remarkable two thousand year journey of the wandering Jew. On Shabbat we eat Cholent, which reflects our French connection. On Pesach, we redeem the Afikomen, a word from the period of Greek influence, and some of us use the word 'daven,' whose origin no two linguists can agree upon. I am concerned about the disappearance of the language of Judaism for the same reasons Harry Washburn is fearful that Yuchi will go the way of the sabre tooth tiger.
Language carries culture and values, and as the one disappears, so do the others.
Some would point out that English is essentially a Christian language. Every country in which English is the majority language, Christianity is the majority or even the official state religion. Television presents a glamorous world, and never gives you any idea how to connect that world with yours. This is pure cultural nerve gas. I would go further than Dr. Woodbury.