I think that was the whole point. Moira even mentioned Charles arrogance in her notes. When they thought something was coming originally it looked like a bunch of kids on the shore trying to see who was coming. If it wasn't kitty those kids on the beach would be dead as Jean arrived late. Then I think Xavier was operating under the guise that since no one knew the exact location of karoka they wouldn't have just dove in. But let's say instead of humans they taped dominos skin to a nuke and dropped it. Then what, most would be dead. Then you add in wolverines line about becoming complacent when beast apparently all of a sudden forgot what a predator was. Top that off with the " we don't trust anything that doesn't come through the portal." Like there is no other point of entry and it shows of your going to be a country you have to do country things like have real defenses and a real immigration policy. Then you basically had black Tom telling everybody how basically stupid and naive they are being to be all lalala now that we are just out of there way humans will leave them alone. You also got Jean saying they being slow and stupid and it's all right there. We were heavy handed slapped over the face with just how stupid these guys are being. Now imagine if instead of 4 people it was 100 and he couldn't be more heavy handed why xforce is needed but I don't think it was sloppy it was over the top intentional.