From the moment he got the memories of his parallel self, Lucas understood one simple thing.
This world was not a fair place.
One could put everything they had into one thing, yet they might still never reach the heights that those who didn't even put half of the effort into the same thing.
It was not rewarding.
Not fair.
Justice didn't exist.
It was a place where only the strong ate the weak. If you were the winner, no matter what, your traces would remain.
No one would remember the losers.
That was what he realized.
'Hero Butcherer.'
Therefore, he didn't care if the person before him was bound to become a villain or not. People had reasons, and from his perspective, Vincent had the right to become one.
Even after learning what happened to his brother, the world still sided with Middleton's.
In the end, it was Vincent's family that perished in the confrontation.
Just like himself.