While I won't go as far as claiming your children will hate you - after all, you probably don't hate your parents - I will suggest that they'll grow up morally confused. Your defensive response has many logical errors, and your moral base seems to be to do whatever you are told, or whatever you feel like, without reflection or reason.
The good thing about expressing your thoughts in a forum like this is that you get to take them apart and analyze them. I know that my thinking has gotten stronger because of good, well thought out arguments that others have presented to me, and I've often changed my mind because of them.
To your response: I'll just point out the most egregious logical missteps.
"Hitting no, but swatting ..." It should be obvious that you mean, "Hitting yes, but only ..." Lying about whether swatting is hitting is a bad start. If you agree with hitting, which you clearly do, then say so and defend the practice for what it is.
"I believe in what the Bible says, ..." This is an easy fill-in-the-blank statement. The question it raises is, do you believe everything in the Bible, or just the parts you like? If everything, do you apply all of it with equal moral force? I examined this question personally a while ago, and concluded that everyone picks and chooses what parts of the Bible to believe, including those who believe none of it. I can't find a way to actually believe all of it, though, without adding lots of convoluted non-biblical theology, which amounts to claiming that parts of it don't mean what they say. (See the remarks on "hitting" above.)
"Just because you don't believe in X, don't tell me I'm wrong or bad for doing it." Another fill in the blank. Can you really put any behavior in the blank? Smoking pot, cheating on your taxes, wearing a mullet, having an abortion, spanking your kids, ethnic cleansing? Obviously these actions run the whole gamut from harmless to terrible. Just because people have different beliefs about them does not make them morally neutral, and certainly doesn't mean that no one should speak up about them.
"What I don't get is why people think they have to attack others that don't think and act the way they do." You might consider that you did exactly this in your previous post. You attacked those who divorce, bear children out of wedlock, and have no "moral compass." If you can answer the question of why you did this, you might understand why others do it, too.
"... it is better to do something than nothing at all." I'm not sure you really meant anything by this. It sounds like a wrap-up argument, but what does it mean? Is action always preferable to inaction? In the area of child-rearing, is there never a time when stepping back and letting things happen is preferable to interference? This statement oversimplifies the case, presenting a false dilemna. The choices at hand are not "something" or "nothing at all," but several different "somethings." In this case, hitting as disciplinary punishment, or timeouts as a behavior modification technique, or many other options.
I'd sincerely suggest that you examine your own moral compass. What makes something right or wrong? I know that reflecting on, and writing about, these issues has improved my thinking and my sense of morality.