And yet Gordon, in an increasingly secular society inequality has risen in health
Has it? 100 years ago virtually no-one had health-care, and those that did were the extremely wealthy (although it was questionable). Now we have a free at the point of use national health service. We have people threatening that status, currently, a group that historically have fostered an association with the Church of England; was it not considered to be 'the Tory Party at prayer'?
mental health
It would be wonderful to see what sort of figures you're using for mental health comparisons even twenty years ago.
life expectancy
Even discounting the spectacular decrease in infant mortality, life spans have been increasing gradually for decades - not as a result of secularism, to be fair, but because of improved nutrition and healthcare.
wealth
How much of the UK population is in absolute poverty, now? We've had to stop measuring it, and start measuring poverty after housing costs, or relative poverty - those are important, but they are signifiers of a change in the nature of the conversation such has been the cultural and societal growth in this area.
opertunity
Universal education. Increased access to further education. Equal access to the job market for women. Anti-discrimination laws for religion, ethnicity, sex, disability. Even people who can't spell opportunity have more opportunities than they did just fifty years ago.
housing
There is, currently, a problem not directly of housing (or, at least, not entirely) but certainly of housing availability.
What religious inequalities do you propose outweigh this?
Why would I need to, they're largely different questions (with the possible exception of the 'opportunities' where mainly you can't discriminate on the basis of religion). The point of secularism is not to cure all the worlds ills, it's to address one particular issue - religious privilege. If you can show how the few points you made where things are worse than they used to be are as a result of the decline of special privilege for religion, or if you can show how the current imperfect status is being held back from improvement by not affording religion a special status, then I might be able to help you.
Currently, though, you're raging about the colour of sea at someone who's pointing out that we need to stop dropping cigarette butts in the National Parks.
O.