Adam Clarke on Exodus 13:17

God led them not through the way of the land of the Philistines, etc. - Had the Israelites been obliged to commence their journey to the promised land by a military campaign, there is little room to doubt that they would have been discouraged, have rebelled against Moses and Aaron, and have returned back to Egypt. Their long slavery had so degraded their minds that they were incapable of any great or noble exertions; and it is only on the ground of this mental degradation, the infallible consequence of slavery, that we can account for their many dastardly acts, murmurings, and repinings after their escape from Egypt. The reader is requested to bear this in mind, as it will serve to elucidate several circumstances in the ensuing history. Besides, the Israelites were in all probability unarmed, and totally unequipped for battle, encumbered with their flocks, and certain culinary utensils. which they were obliged to carry with them in the wilderness to provide them with bread, etc.