jade agrees with diplomacy! but he feels like there are people better qualified than the rangers to do that, so it's better for the rangers to be on the ball and ready to carry out a backup plan (namely: ATTACK ATTACK ATTACK) if things go wrong

also he's actually quite passive when it comes to these things, so i'm also going with 'his superiors ordered him to' :|b

tl;dr i don't think jade would be invested enough to order apollo (having someone reluctant along for the ride is almost as bad as not having them along), but he'll definitely be trying hard to persuade him. he knows apollo will be an asset!