system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] Why was there that mention after the Helicarrier attack that Thor couldn't grab Mjonir?

Edit: meant to say "moment" not "mention". Mobile auto correct.
gpt
He was resolving to kill his brother if it was necessary to protect Earth. Up to that point, Thor had been trying to talk him down (even though he had been killing humans). His hesitation to pick up Mjolnir reflects how torn he was by the decision, not any lack of worthiness.