IANAUSL but, while a battery is a harmful and/or offensive touching, in general it seems to me that the harm or offence must be to the person touched. If you hit my wife I will certainly be distressed and offended, but you will be charged with the battery of my wife, not me.
So if I baptise a child against its parents wishes, and the child is happy (or indifferent) and is otherwise uninjured but the parents are distressed and offended, I somehow doubt if that would be a battery of either the child or the parents. The child has been touched but not harmed, and the parents have been hamed but not touched.
There is a tort which goes by various names in various jurisdictions but amounts to the negligent (or reckless or intentional) infliction of emotional distress. The classic case involves somebody telling a woman that her husband had been badly injured in a car crash when nothing of the kind had occurred.
The emotional distress has to be severe and (at least in my jurisdiction) has to have physical consequences; simply being very, very upset is not enough; at the very least, we’re looking for the clinical symptoms of shock. There’s no remedy for hurt feelings, however badly they’ve been hurt. And, of course, it has to be a foreseeable consquence of the defendants actions or statements.
I suppose its possible that, if I baptise a client against the wishes of its parents, they’ll be so upset that they’ll suffer a nervous collapse, but I suggest it’s not really foreseeable in the absence of special circumstances; e.g. they belong to a sect which believes that the “wrong” baptism will damn their child. If they’re simply offended because of their own atheist convictions, sufficiently severe emotional distress is not really foreseeable, I would think.
In the case of the witch, severe emotional distress probably is more foreseeable, but I guess in the end it will be down to the jury to say.
But note that to bring this action the plaintiff has to argue that the act or statement complained of, and the offence caused, is <i>not</i> purely symbolic; he has to point to actual physical consequences in himself resulting from the act.