All newspaper columnists write in order to inform and entertain an established readership which is in line with the editorial policy of the paper.
In the case of the Mail, its readership is largely right-wing middle-class people who have a strong aversion to homosexuality as a lifestyle.
The columnist in question has taken a series of unqualified circumstances known only to the individuals in question, combined with an unexplained death which enjoys the sacientific - as opposed to scandal- mongering - result of a post-mortem. The has then turned the mixture into a self-righteous tutting dear-dear rant about effectively, how a deviant lifestyle wiil get its just deserts sooner or later, and this is a warning for any similarly inclined young men who think being a gay pop star as a lifestyle to choose and imitate.
This poisonous nonsense chimes exactly with the Mail's known distaste for celebrities, gays, perceived hedonists, and people who consort with foreigners, so as far as fitting in with the readership, it is bang on target. Of course, the Mail lives in its own enforced splendid isolationist world where only 'right thinking' married people who pay their taxes and support 'our boys' have a right to die in tragic circumstances.
Occasionally, such as now, the pesky low-rate inferior 'real world' gets upset and pokes its nose in, so the Mail has to grudgingly apologise for offence (for what, Miss Moir wonders, she is only speaking the 'truth' after all?) to any trendy left-wing lentil-steamers who don't know about real men and proper liffestyles.
It is summed up by one who writes far better than i ever could - please read the way to shoot down a Mail columnist as it should be done -
http://www.guardian.co.uk/commentisfree/2009/oct