But now that he believes that you’re simply being manipulated, he doesn’t contact you at all. Why? Obviously the plot demands it, but there’s an obvious solution that fulfills both the needs of the plot and a consistent story. Aldaris knows that Kerrigan was able to gain mental dominance over Raszagal. He also knows that you, Artanis and Zeratul have all been away, secluded with Kerrigan for the voyage. It would be credible to play up Aldaris as paranoid, unable to trust any of you because he believes that Kerrigan could have enslaved you as well. This could be played with Artanis or Zeratul trying to contact Aldaris but him simply sounding insane in his responses, explaining why he won’t contact you or trust you, and also making Kerrigan that much more terrifying by demonstrating what her actions have done to such a cold, confident Protoss. In fact, I’d assume this hypothesis to be true anyway, if not for the fact that Aldaris clearly contradicts it by saying “you believe me to be a traitor”, indicating that he believes you to be deceived, not dominated.