Comcast's perspective was that Netflix was using "their pipes" for free. Those "pipes" are what their paying customers are paying for. Not to mention the hefty government subsidies that go to cable companies to establish internet service in the first place. A google search today reveals plenty of VPN providers offering workarounds Comcast's throttling which is still going on today.

ISPs should deliver bits in a way that's fair to their paying customers. Period.