We are heading back to Federation Space and wish to have no conflict with you. We believe what we believe, and you believe what you believe. Morgan was trying to remain calm. The Captain losing her temper was the last thing the Sisyphus needed. She knew the Christ-Borg would probably see that as an example of inferior morality, and attack immediately.
Reason is irrelevant.
You will be assimilated. Every knee shall bow. You are sentient beings, therefore it is required that you accept Christ Jesus as your saviour. This will happen. Morgan had heard this speech before.