If people knew that Gabriel was here, the dark haired man was still convinced that they would be prepared enough to face him. That way, the chances of Gabriel causing too much damage could be contained.
However, when no one knew what was coming, that was a disaster. He didn't even know how many lives could be lost. At the moment, he even wondered if Gabriel was here to save a soul like he came here a thousand years ago.
He wasn't stupid enough to think that Gabriel was going to let them live to inform others. There was no way their clans could know.
"Where do you want to go?" The lifeless man asked. Even though he was an undead, he still feared Gabriel since the man was similar to a reaper, having a soul container inside his body!
Once he killed someone, the souls couldn't escape either! They could only be swallowed by him, so there was no chance of ever returning, even in the form of an undead, unless he let them go out of his own free will!