If you are at maintenance and eat that much protein you aren't getting fat. If you do it's not maintenance.
You don't get insulin resistant from "fast carbs" per se. What are "fast carbs" anyway? Rice? Fats and protein can contribute as well. You get insulin resistant if you overeat period, and don't exercise. Or use a lot of GH.
You can search for "protein insulin resistance" to see how protein can contribute to IR.
Carbs don't get stored as fats easily in normal circumstances, they have done studies on this. Search for "de novo lipogenesis overfeeding" or similar terms.
However when you eat a lot of carbs you stop lipolysis and any eaten fats get stored so the end result is fat gain.
Gave these two a look; very interesting, didn't really know much about it. The only thing I knew regarding protein and insulin was that protein releases more glucagon than insulin. I'm just trying to figure it out to be able to get the most out of my nutrition. Thanks for sharing your knowledge!