Considering how kill-happy Oliver was in Season 1, it might be hard not to side with James at least a little bit.
It does tie back to Season 1.
We really wanted Oliver [Stephen Amell] to have to reflect on who he was when he came back from the island.
Prometheus’ alter ego – who is currently known only as “James” – has been described as a contemporary of Oliver’s who is extremely charming and charismatic.