Why was a “pike” the weapon wielded by the “Giant of Kandahar?” Is it the case that the Anunnaki have no “Second Amendment” and lower caste members cannot be trusted with anything more than bladed weapons?

This is not the correct interpretation for what was found with this Anunnaki individual. He lacked a weapon of significance because that was not his function on the mission he was part of. His role was to deal with physical artifacts which might be buried or partly buried and he only had some tools at his disposal to use for that purpose, but not a weapon. So when he wandered away from his group and did not rendezvous as prearranged, he was left behind with no real means of defense and was literally cut off and this sealed his fate.