Rafael's was two footed. He left the ground and block tackled the ball. The only thing that saved Raul from injury was he pulled out - either from bottling it or injury.
Either way, the game stops and Stevie doesn't make the challenge
Yes, if Webb gets that call right. He didn't, and Gerrard makes what is indisputably a red card worthy challenge, and is sent off. Gerrard doesn't have to make the challenge in the way he did - Carrick managed to challenge for it fairly, Gerrard didn't.
My last time repeating this but Webb is shit, he's inconsistent, he's a horrible ref, reffing at OT in general is a total joke, and I'll moan as much as anyone about bias and Webb and and and.
But in and of itself, Gerrard's challenge was a red card...what you've said is a very fair and correct point, but again no-one can convince me that Gerrard's wasn't a red card offence, because it was.