An excellent post thumbwitch.
Any education topic gets heated exchanges on both sides. If someone posts expecting agreement,they are sadly disappointed! In some cases they take umbrage!
It isn't just private v state. If you try discussing the virtues of schools on HE threads it takes about 4 posts before you are told that you shouldn't be posting! I would say that selective v non selective is far more contentious than either.
Seeker is quite right in that most people have no choice-they have to use state comprehensives and make the best of them. I am just as guilty, I extol the virtue of comprehensive education but I am conscious that I have 'bought' my way into an area with good schools.
HEers will insist that anyone can do it-you can be depressed and do it, you can work part time and do it,you can leave them with child minders and still do it, your DCs can want to go to school and you can still do it, your DCs can refuse to do anything but play computer games and you can still do it (and be better than schools).
Those that educate privately insist that if people do without luxuries they can afford to 'put their DC first'-ignoring the fact that they can't afford luxuries in the first place.
Those who say that grammar schools are a wonderful way out for the disadvantaged DC, manage to ignore the fact that they would use a tutor to claw the place away from the bright DC who has no help from parents and won't even see a practise paper.
I don't think that mumsnet could make a collective statement on anything to do with education! It certainly doesn't 'hate private education'.