You'll note that nowhere in this post does Sunny deny that he will stab his allies. Again, I'll reiterate that Germany cannot stab our allies. If we do, we essentially kill ourselves.
We are already involved in a conflict with Russia. Opening another front would be disastrous for us.
The stronger a power is, the more likely they are to stab you. They don't need you.
Sunny doesn't need you besides to take my centers. Once he's achieved that goal, he's perfectly willing to give up your centers.
Also, Italy, I am not planning to attack you. Sunny is simply putting words in my mouth (hey, the exact same thing he accused me of!)
I cannot take the "lion's share" of centers and break my promises because that can easily backfire on me if both England and Italy pair up to attack me. It's a very risky proposition for me. But not for Sunny - he doesn't need you, Hydro. He doesn't need you, Duskfall.
You're all getting played if you join hiim.