Well, how were mostly disorganized barbarian tribes a threat to the more organized and technologically superior Roman Empire? How are insurgents in Iraq and Afghanistan a threat to U.S. troops? Technology isn't a win button. It's an advantage, sure, but a lot of factors can lead to the defeat of a force that looks superior on paper.
Exactly. People need to study history. Technologically inferior barbarian races have managed to pwn quite a few technologically superior empires.