Here's what's airtight. Rish got caught spying. RoK did not. The position of advisor is honorary in RoK, meaning that Rish had little, if any, power in the government, and saying that this was a giant plan by RoK to spy on alliances is foolish. Van Hoo, the leader of RoK, came in and specifically said that he had no idea what Rish was doing behind the scenes and then took appropriate steps against Rish's spying.
Let's do a side-by-side comparison of the two, shall we?
Van Hoo, having no knowledge of Rish's spying activities, came on and took appropriate actions against the spying former member, who had just recently rejoined RoK for the war.
mhawk, having 6 months prior knowledge of Zero Hawk, which he formed and sent to cause upheaval in Athens, did not contact Athens regarding this plot, did not move in any way to stop this plot. In fact, only Zero Hawk's members' willingness to come clean and disclose everything to an alliance they had been sent to destroy, but instead befriended, stopped the plot.
6 months is enough time to come clean after the Karma war. mhawk didn't. Therefore, he's paying the price now. Though I wish it had only been those who had been involved in the ZH conspiracy who got punished.
Van Hoo came on after slightly more than 20 minutes after the matter came to his attention and apologized.