Is it worth firing this employee or not?

Some of the links in the chain are jealous and threatened.Liked it or not he's doing the job.Maybe some of the links need to be taken out. That's not ment to be sarcastic.Remember there's always weak links in a chain.This guy could strengthen it.Intentionally test him with something. difficult. He could end up with enough rope to hang himself if he's that arrogant and inconsiderate.