Mostly harmless until they are not.
They will attempt peaceful coexistence with a dangerous neighbor but I don't think they psychologically can handle the switch between enemy and friend the same way humans can.
They are a deeply conservative species that picks up cues from others. Kind of stuck in groupthink. An individual K'Kree may get upset with a human but will be watching what other K'kree are doing about it. So you can push them and they may back off and see what happens, do nothing and watch, be cautious in responding, until there is a clear consensus that violent action must be taken. Then they suddenly move en mass.
There just hasn't been a big human-K'Kree war and I think the Imperium would have a problem dealing with them. If the K'Kree have 10,000 ships on the border but think they need 12,000 to acheive their military objectives - then they will hold off the war as much as they can until they have the 12,000. They will set clear objectives and may be prepared to stop when the objectives are met if this creates a situation where they feel the herd is not threatened.
The resources they can bring to bear are huge. Internal conflict is not known. They don't have ongoing problems with anti-social citizens. A lot of resources the Imperium uses for police, local planetary forces, and Imperial forces to show the flag and uphold Imperial law just aren't needed by the K'Kree. They can maintain all their fleets on the borders with little/no fear of rebellion in the interior. And they can handle a war footing better. At some point increased taxes and shortages of materials will cause humans to resent the central government. Sure the Spinward Marches is completely behind the Imperial war effort against the Zhodani, but if it drags on too long the merchants in Illelish and Masila may question whether holding onto such a remote region of the empire is really needed.
But if the K'Kree collectively conclude that the Third Imperium is G'naak they will keep supporting the war effort for as long as needed to ensure that these G'naak are kept a safe distance from the Herd.
They will attempt peaceful coexistence with a dangerous neighbor but I don't think they psychologically can handle the switch between enemy and friend the same way humans can.
They are a deeply conservative species that picks up cues from others. Kind of stuck in groupthink. An individual K'Kree may get upset with a human but will be watching what other K'kree are doing about it. So you can push them and they may back off and see what happens, do nothing and watch, be cautious in responding, until there is a clear consensus that violent action must be taken. Then they suddenly move en mass.
There just hasn't been a big human-K'Kree war and I think the Imperium would have a problem dealing with them. If the K'Kree have 10,000 ships on the border but think they need 12,000 to acheive their military objectives - then they will hold off the war as much as they can until they have the 12,000. They will set clear objectives and may be prepared to stop when the objectives are met if this creates a situation where they feel the herd is not threatened.
The resources they can bring to bear are huge. Internal conflict is not known. They don't have ongoing problems with anti-social citizens. A lot of resources the Imperium uses for police, local planetary forces, and Imperial forces to show the flag and uphold Imperial law just aren't needed by the K'Kree. They can maintain all their fleets on the borders with little/no fear of rebellion in the interior. And they can handle a war footing better. At some point increased taxes and shortages of materials will cause humans to resent the central government. Sure the Spinward Marches is completely behind the Imperial war effort against the Zhodani, but if it drags on too long the merchants in Illelish and Masila may question whether holding onto such a remote region of the empire is really needed.
But if the K'Kree collectively conclude that the Third Imperium is G'naak they will keep supporting the war effort for as long as needed to ensure that these G'naak are kept a safe distance from the Herd.