Well, I hate to be the bearer of bad news, but Sabra *IS* technically right. I speak a little Arabic (less now than when I regularly hung around with people from the ME and before I started school). Hummus *is* the Arabic word for chickpeas, as well as the paste made from chickpeas and other ingredients. Other types of beans have other words to describe them and their products.
That being said, this is a marketing driven decision and may well come back to bite Sabra in the @$$. Just sayin’.