Re: Will & Thomas
Riker didn't hesitate to kill the clone of himself. That was a different situation, but maybe he's has a deep seated distrust/hatred of any copy of himself. It would be doubled because it would be a trait of both of them.
We've taken care of everything, the words you hear the songs you sing, the pictures that give pleasure to your eyes. It's one for all and all for one, we work together common sons, never need to wonder how or why.