OP, you need to take a very deep breath and recognise that pretty much every tax change creates winners and losers, and the effects can be quite extreme - including bankruptcies, businesses failing and people's lives changing significantly.
However I'm guessing that you, like me, being a net contributor to the exchequer haven't been personally hit by a tax change in such a significant way previously. That's why it feels disproportionately unfair to you and "obvious" to you that it's egregious, people who support it are thick and spiteful.
But once you start attributing motives to people's opinions about tax decisions, you're on a losing argument.
People's opinions on public spending and where that money should come from are complex and varied. Someone thinking that taxing the parents of private school pupils more rather than, say, cutting benefits for pensioners or raising taxes on small business is a fairly mainstream and non-thick view, just as much as someone else saying they'd ban tax on all educational services and reduce public spending on out of work benefits instead.
People will disagree vehemently with both points of view based on their own values, political views and whether it affects them, but it doesn't make them stupid or spiteful, it just means they value different things more.