Looking back, I guess the Gods were never trying to directly assist the king
They are all thinking about giving more trials to Raoul, but all the examples are all almost like personal attacks to Raoul and people close him: his mother, his sister, the orphan kids, and his friends betraying him.
with that in mind, killing the citizen of Raoul's paradise fits more with those examples than assisting the king of human race, even if the latter might be of their interest as well.