Why get so upset about homeopathy?

Some of the criticisms of homeopathy are really quite vitriolic. The language gets very personal and insulting and the amount of effort which the critics put into making their attacks has often quite astonished me. I mean, what's the problem? The attack is on a form of therapy which has a track record of killing exactly zero patients in over two hundred years of use and any surveys of users of homeopathy consistently report personal stories of benefit and relief from suffering. I know that a lot of the attack comes from "scientists" who can't accept homeopathy because of the issue of dilutions but you know other "scientists" claim to show that high dilutions DO have biological effects so any debate in this area should be about whether or not such effects can be demonstrated then setting out to try and explain how that might happen.
But a scientific debate about how something might or not might not work should not get vitriolic, should it?
There must be some other motive. Well, take a look at this article in the British Medical Journal. This doctor describes the incredible over-sensitivity of Big Pharma to criticism. Drug companies just don't want you to know that there are other treatments available which they don't sell. In the UK, there's a "charity" called "Sense about Science" - have a look at who funds it.