Remember how giddy and excited he was when Juliet was visiting? He was so happy!!! And then she goes off with Goodwin...He couldn't take it. He let Goodwin basically kill himself because Goodwin can't keep his hands to himself (Goodwin Fails In His Death). He was so mad that for a moment he felt like forcing her to love him. But he couldn't...And I feel sorry for Ben. I think Juliet takes him too seriously. He was heart broken. And just because hes heart broken doesn't me hes gonna risk his neck to make sure nobody touches Juliet. He knows Jack loves Kate. He knows that Jack and Juliet will just make Juliet heart broken. Wouldn't he want that? So I doubt hes gonna hurt Jack.

Still, I feel sorry for Ben.