locking your rear wheels will send u into a spin or cause you to lose control. the front brakes have the most bias because they have the most weight over them, which helps with traction when slowing down.
u dont want more biased sent to the rear...there is no weight over it, it will lock up.
u cant ever really stall the car if your actually moving, you can be premature in a higher gear, which causes clutch chatter and shuttering.

i still dont understand your point.
it sounds like ur premature in gear going down a snowy hill while braking. and the abs is preventing your wheels from "locking" but since you have the clutch engaged your tires are actually spinning at idle in the snow.

how much tread is on your tires guy?
and how much snow are we talking about here

~boom