He has to much confidence in his abilities despite the fact that he hasn't fully escaped from the cyclops.
THE ANSWERS ARE:
-The master stopped at the rusty iron door and pulled it open on rasping hinges.-We saw him disappear down the steps into the dark,<span>-Then we heard the awful, terrifying sound that haunted our sleep</span>
Answer:
This suggest that Grendel intends to not meet much resistance.
He isn't considered honorable due to these acts
Explanation:
Snatching the men in their sleep and at night suggests that Grendel does not hope for much resistance from the men. Grendel comes when they're most vulnerable hoping to have an easy kill while the men would not be in the best position to fight back.
This is not a honorable way to attack an enemy.