Gunner did not wish to bother to trade simple words with this group. None of them could match him in his base form, much less if he activated Earth's Guardian. Even Achilles, who was part of their convoy, could slaughter them all with ease.
Once one had enough power, the need for politics and fancy mind battles diminished. This also slowly lowered the intelligence and logical reasoning of those with power, which was why they often - to us, the weak - seemed to be doing foolish things.
Then again, Gunner did not like complex scenarios. He left them to Darius, who, no matter how powerful he got, would use his mind first in any situation.
"You are in the way of the Safemoon Army. Please clear out so that we may proceed."
For the half-giant to stay this polite to this group, he really had come far. Perhaps he felt there was no need to bully them, or becoming a father had softened his heart.