The big difference, however, between Thor’s actions and Star-Lord’s actions is that Thor actually could have stopped Thanos.
Like Star-Lord, Thor only thought with emotion, wanting to avenge the ones he had lost, yet Thor’s actions managed to have a much larger impact on the future of the universe.
Thor knew the power that Thanos had with all six Infinity Stones, but he didn’t care.
Instead, there is one character who is to blame for letting Thanos get away with his plan: Thor.