He offered them the chance to leave, if they abandoned Black Marvel. While the other Slingers wanted to leave Black Marvel to this fate, Hornet was able to forgive the old man, and convinced the others to help free Black Marvel.
He presented an option for them to leave, if they gave up on Black Marvel. While some of the Slingers wanted to allow Black Marvel to remain under its current circumstances, Hornet was able to overlook the old man's past and encouraged others to help free Black Marvel.