The difference is that most of what we think we know about Israel comes from the Bible. For other civs such as Egypt and Babylon and the Hittites we have a slew of resources, including inscriptions on monuments, tablets, records and second-hand details from other civilizations, and so on - to the shock of many, Israel is barely mentioned, if at all, in the records of various contemporary states such as Egypt and Assyria. For instance, while the Bible talks about a so-called Shishak invading Judah, on the Egyptian side of things, while most scholars associate Shishak with the Pharaoh Sheshonq I (to my knowledge), Sheshonq's various inscriptions and records make barely any mention of Judah, if at all, only vaguely discussing how he went over to Canaan and beat the crap out of some places. As another example, I've also read that the famous figures David and Solomon aren't mentioned anywhere in contemporary records in neighboring states. Contrast this with the records in Egypt and elsewhere which are not only abundant in comparison, but can be cross-referenced across different regions and states. More or less, the fact that we even know about Israel really comes from the Bible - perhaps it is an exaggeration, but I'd think if it weren't for the Bible we wouldn't even know of the existence of an ancient Israelite state at such an era... if it existed at all.