It's the absolute paradox of democratic societies. States governed (broadly) by their people will do bad things, because people do bad things - but states not governed by their people aren't democracies.
Personally I have no problem with the principle of the removal of citizenship - even when that makes someone stateless - what matters, for me,is who gets to make that decision, and how, and to who, they have to justify it.
I would prefer it if the Home Secretary had to go to a panel of senior judges to get it through, and that it was then voted on in parliament. It's a big decision, and it needs the widest possible buy-in from society in order to be legitimate.