You must be watching a different video than I have. Cruz never sweeps anyone with the muzzle, and the video shows him shooting a pheasant.
Hard to do that with an unloaded gun.
I watched the video Siler posted on Twitter when he made his comment about Cruz...that's the link I provided to you in post #4 which also contains the relevant part of the quote you provided from the Texas gun safety people.
I already posted a link to the relevant video Siler was commenting on and it clearly shows several people behind Cruz...so I'm not sure what your point is.