There's nothing wrong with offering a foreign language as an elective, or (as RoadKingLarry pointed out), making it a requirement if the opportunity to pick from a list is given. In my high school, Spanish, French, and Russian were offered.
But mandating Arabic, of all things, as a "Language of the Future" really IS one of those things that grabs people's attention . . . and not in a good way.
Fed.gov probably would like to have more Arabic translators, since there's a shortage (especially since hiring of Israelis is discouraged.) But mandatory Arabic classes for a year or two won't get us there.
Also, aside from language, Arabic culture is supposed to be taught. Yes, we use Arabic numerals, and there's no doubt that will be emphasized. But so much of Arab culture is either unsavory (e.g., pederasty, polygamy) or so tied up with Islam (mistreatment of women, jihad, religious persecution, etc.) that teaching Arab "culture" will either mean distortion & outright lies, or actual religious indoctrination. Making this a requirement smacks of a dhimmi mindset.