Some of us looked at the charts for the last 300 years and could see that virtually zero rates weren't normal.
Let's assume you really did this.
The average rate over 300 years is 4.7% - we're a bit above that now.
That is skewed a bit by the 70s and 80s - without which the average is 4.3%
Even if you then concluded the interest rates in Febrary 1815 probably had little influence on today and only looked at the last 100 years - 5.1%
Over the last 50 years: 6.4% and that's a mean average. If you were looking for mode (arguably a more relevant figure when looking at individual mortgages), it's 0.5%.
So they are currently just about on par with the last 50-100 years mean average. You could argue mode average is a better representation of what is normal. Over the last 50 years, that is 0.5%.
As much as it feels reassuring to say 'you've been idiots' - the reality is that most people have just been trying thier best for their families and have had the bad luck to the ones in this particular circumstance.
And even if they have beeen idiots, there will be plenty of 'innocent' people caught up in it, like children.
But, of course, that's a lot of words to really just say what pp did: there’s no need to be an arsehole to people who are worried.