It is not wise to show dislike towards anyone, even if you do harbor negitive feelings toward that peroson. any person can offer potential benefit to you in the future, even if he does stabbing you now. If someone is working against me, I would most likely suck it up and play dumb until what he does becomes extremely obvious.
Unless you have a obvious open vendetta towards him and everyone knows it. then it not wise to openly show dislike.