Episode 5 all but confirms that Jod is not a legit Jedi (or if he is he's long fallen), that he only knows of their ways second hand, or perhaps had a personal negative experience with one (not surprising, he's a pirate, they don't typically get on well with Jedi), his cheeky non answer when Wim questions how Jod is able to "use the Force" when only Jedi are able to do that (according to Wim's limited knowledge), says enough, but his cynical incorrect understanding of attachments-framing them as things that hold you back-clinches it
Actually that view is very in line with the followers of the dark side, who believe caring about others is a weakness, and you must abandon or kill what you care about or they'll be used against, in contrast to the Jedi belief of attachments being things that you must be prepared to let go of or accept when they're gone
Also his later actions in the episode also give a pretty good indication he is long past being on the up and up morally