Now we're comparing spanking to raping. Nice.

It's kinda like the Godwin. Compare spanking to one of the worst offenses.
Look...you don't spank your kids (or wouldn't if you did, whatever) and that's fine. You don't see me saying "oh, you're raising your kids wrong if you don't spank! You're abusing them by grounding them! Time outs??! Why not just shackle the kid to the wall!!!"
See what I'm saying?
Go after those who are actually abusing their kids. I was spanked as a kid and I never once thought of it as abuse. NEVER. I was appalled to learn that the public schools where I grew up were encouraging children to report their parents to the teachers if they were spanked!
In my opinion, the line marking 'abuse' is pretty arbitrary...everybody's parents screw up. Everybody's parents hurt them. Everybody spends at least a few years recovering from their childhood. A certain amount of 'abuse' within any relationship is just...part of the game of being human. People screw up and hurt each other. It doesn't mean the entire relationship needs to be thrown out or denounced.
So, would I say that spanking is abusive? Yes...as an action, it is. Lots of things that lots of parents do are, discretely, abusive actions. Would I label all of them "abusive parents?" No.
Caring for a child well enough 99% of the time can help temper the negative effects of that 1%. Most of the time... to some degree.
That said...yeah...I'd completely say spanking is like rape. It is often forcibly denuding and physically violating a person who is weaker than you. If not that, exactly, it's usually something pretty similar--the force may be mental instead of physical, for example.
As for our reactions...consider the abortion debate---on one side, you've got people who think something is ok. Maybe not *good,* but an acceptable thing to do. On the other side, there are people who fully believe it is *murder.* When that sort of view is involved, you can't just expect people to nicely agree to disagree. I have never once told a pro-lifer "if you don't like abortion, don't get one and leave it at that,' because I know they can't. It's unreasonable to expect a person to walk away and say "Well, that's their choice," when they think somebody is chosing to commit murder.
The same sort of thing is going on here. We are seeing children being violated and, as a result, adults and society as whole being *badly* damaged. It is not reasonable to expect us to just pleasantly agree to disagree.
It is wrong.
It is harmful.
It is bad for everybody involved.
OK, people may say "I was spanked and I turned out ok," but people are notoriously horrible judges of how they turned out. More than that, I believe that the negative effects of even moderate spanking are terribly insidious, and stunt a person's ability to think in ways that that person would not be aware of in themselves. I've watched a friend claim to be utterly un-exploitable. She was just too strong to be tricked! Well...no...all it took was for somebody to have the slightest bit of authority over her, and she believed she had to do anything they said. But, as she believed it was right and proper to be that way, she couldn't see the contradiction.
Another guy in a class I was in claimed, again, that being spanked was perfectly good for him. His parents had been calm and controlled about it, etc. etc., and he turned out just fine. Well, he turned out to obviously parrot his parents beliefs without thought. An absolute throwback to the 1950's. He was openly racist, openly sexist, talked about this *craaaaazy* liberal girl he had dated once, when he was going through a rebellious phase, who was *soooo* out there, she actually thought she was his equal! But, again, he believed he turned out totally fine, because he defined the way he turned out as being what fine is. It was everybody else who was messed up!
The sexual things are what make me bristle and shudder, but this is the deeper, more thoughtful reason why we are opposed. America, more than most other countries in the developed world, needs to learn how to evaluate ideas based on their merit, and not on the authority or tradition, behind them. America, especially, needs to learn how to find non-violent solutions to problems.
America needs to stop beating these qualities out of our citizens.