Since you directly referred to 'life under her rule', which is an experience, when you actually hadn't experienced 'life under her rule' means you would only ever be reflecting upon someone else's narrative of life under her rule.
In short, just as I have no idea what life was like in the second world war, because I wasn't alive then, you don't have any idea of what life was like under Margaret Thatcher, so why on earth you would raise a glass at her death I have no idea. It's not only meaningless, since you had no direct experience of life when she was PM, but it's frankly odd.
I helped to raise five children through the thatcher years
Saw my brothers health ruined in the aftermath of the miners strike
Buried my father a year into his retirement from the pit he was 65
I qualified as a psychiatric nurse during the thatcher government's betrayal of the people I was caring for
I returned to teaching in the youth justice system during her rule as youth crime soared
I was lucky
I was never unemployed. I did tough jobs, but jobs I believed in
My family turned out ok
Don't tell me I don't know what it was like then
I didn't raise a glass to her death: it means nothing to me
I raised a glass to having survived what she had to dish out and to my memories of those times and what they did to people I cared about.
If you have no idea about what life was like in the Second World War or the First World War literally no idea then check out your local war memorial as a starting point and take it from there. Ask yourself what wars do to people
Are you saying that because I wasn't alive during World War One and World War Two then it should have no impact emotionally on me or other people?