Which makes me think that the guards may be hosts, too. But there are so many contradictions even if they are hosts. Maeve seems to be able to recognize a host, and make other hosts do whatever she wants them to do. We saw that 1-2 episodes back. So if all of these guards are hosts, she could just command them to stop and join the forces or something. Instead, she is hiding, and letting her 2 robot recruits kill them.
There is no way getting around the fact that the particular scene was poor for this show's high standards. If the guards are coming with an idea that the hosts won't kill them, OK, fine, that is a valid excuse for the first casualty. But what about the rest? Some of them saw their buddies getting shot, yet they are like in a bad Stallone movie, they come one by one and take their time to pull the trigger
Most of them end up dying by the time they run up close, aim, think about it whether they want to shoot