At the university at which I work, I was for a number of years actively involved with others, mainly but not exclusively Atheists, in campaigning to preserve the secular nature of the university - i.e. not distorting the university's character in order to appease particular religious standpoints.
As I am now only part-time in the uni., I have had less involvement, but met the leader of the campaign, an Atheist, the other day, and he seems satisfied that we made our point, and that for the moment, things haven't got any worse.
Incidentally the faith viewpoint which is making by far the most demands in universities these days for special treatment - and often getting it - is Islam of a very conservative ilk. In my university, the Islamic Society has the exclusive use of two large well-appointed prayer rooms, provided by the university, strictly segregated by sex. All other groups, including Christians and Atheists, have the use of one very small room for meditation. There is constant pressure for timetables etc. to be structured to suit Islamic sensibilities.
I have had many Moslem students over the years. Mostly they have been of the non-Fundamentalist, "progressive", type, and, especially the women, don't want anything to do with the Islamic Society. I, and another I know, have attended meetings of the Islamic Society, and been quite disturbed at what has been taught to the members (blatant homophobia, nikab should be worn by women, the west is the source of all evil etc.etc.). Yet these societies tend to be treated by universities etc. as if they were representative of Islam as a whole.
The promotion and preservation of secularism doesn't always however seem to have that much to do with the Law in the impact religion has on other people's lives. Compare the UK and the USA. The USA has stringent laws to separate the state from all forms of religion - there is no established church, no state-funded denominational schools etc.etc. Yet of the two countries, which is the one in which "religion" is a more insistent, and disruptive force?