[quote=Yog Sothoth]
that is a stereotype, and the house is about ambition not being rude. you can be nice and still be ambitious and strive to be great
[/quote]

I never said anything about impoliteness, I said cunning. And they ARE cunning. 

"Or perhaps in Slytherin,
You'll make your real friends,
Those cunning folk use any means,
To achieve their ends." —The Sorting Hat

Hence, my point. They are conniving and will use whatever to get what they want.

EDIT: Also, your argument helps mine. You said that slytherins support each other, in my post I said that the slytherins would SUPPORT Acacia.