Ken - you are probably being way too hard on your mum
Her generation have been well-conditioned over the years: there was a time when most mainstream publications spouted views that today make uncomfortable reading.
The rather sad point to make is that the Mail is insanely popular: and not only within our parents' generation. The paper's circulation has shrunk over the last decade, from around 2 million to 1.75 million: but, there again, the other dailies have also lost out to fashion changes and competition from other media. Some quality journals have fared worse than the Mail (the Guardian is down by a third, and enjoys a circulation of around one-tenth that of the Mail).
So, stereotype if you will, but remind yourself that some of the paper's views resonate quite strongly among the public.