Sort of the other way around. Low insulin makes for the depletion of glycogen and elevation of free fatty acids through lipolysis, this sets the stage for ketosis. Also what makes a diet ketogenic isn't what it contains, but what it doesn't contain--it's the absence of carbohydrate and to some extent protein, not the high fat nature of the diet that makes it ketogenic. I guess "minimally antiketogenic" would be a more techically correct term than ketogenic, but that would be a pain in the butt to say all the time.