There's a long established principle in enlightened faith traditions of condemning the sin of a person and loving the sinner.
I'm aware sin is a word many do not now embrace: if you think of it as missing the mark it's pretty close to what many will mean.
Thatcher missed the mark in what she did, spectacularly. And if Labour does not say so today it is not doing its job. Eulogise the person if it's thought appropriate; she clearly had skills. But that provides no excuse for in by way endorsing her thinking. That can rightly be condemned, even today.