Earlier quoted context omitted.
No, it's not, because the other side also paid for it to their ISP, CDN, or the build-out and operation of their own CDN. What Comcast and friends are asking for is a _third_ payment, just because. And don't be mistaken, if they win this battle they will start looking for the fourth payment, which is from their customers for faster service to "premium" sites like Netflix, HBO, iTunes, etc.
because the other side also paid for it to their ISP, CDN, or the build-out and operation of their own CDN. That's like saying that you should be able to park for free because you paid for your car, all the taxes on it, and the fee for issuing a driving license. Paying your ISP doesn't necessarily grant you unlimited access to every other network on the Internet. There is no God-ordained fee structure here. It can be…
That's actually the whole thrust of the argument, as I understand it. Net Neutrality says "If I buy internet I should get all internet at the flow rate I bought internet."
Content providers would buy a flow rate, consumers would buy a flow rate, and the people providing that flow rate (e.g. Level 3 for the CDNs, Comcast for the consumers) would deliver that flow rate, regardless of what or where it is going.