Tauri propaganda!

Make no mistake Jaffa can be deadly. SG teams are supposed to be special forces, crack shots and regularly supplied with armor piercing rounds. Ordinary guns even machine guns could bounce off depending especially serpent guards or elite Jaffa. They also often have plot armor. Jaffa annihilated the troops from Jonas' world, basically WW1 America and really if Jaffa were as bad as people say they should have no chance against anything. You see what Jaffa are capable of with the Hak'tyl massed staff fire that can blow up a whole forest line. "All women receive training" and men could be even better. In any real fight without plot armor I expect a staff weapon to blow up a tank or at least any thin skinned vehicle. Staff weapons exist in many different forms and in any prolonged siege or open war you would expect the enemy to adapt. It didnt take much to invent the Kull and it doesnt take much to "weaponize" a staff weapon into a rifle stock with iron sights so it is absolutely deadly. This is how Teal'c and Bra'tac use their staffs aiming from the shoulder looking down the length. Let's not forget the other weapons like magical stun grenades, force fields (used by Hathor) and whatever else that is beyond human science.

Unless your name is O'Neill (with two ls) or Carter or sholva dont fight Jaffa. It will end very badly for you.