ATFC Seagull
Aberystwyth Town FC
Not meaning you personally ATFCS, but there seems to be a confusion between "practice" and "belief". I agree that if someone believes in a god (be it the the Christian one or any other) then they should tick the box of that religion whether or not they practice.
The point of the campaign (and my own personal opinion) is that if you don't even believe that a particular god exists, then you shouldn't tick Christian/Muslim/Sikh/whatever just because you were brought up in that culture.
There does indeed seem to be a confusion - not least because the census doesn't state which it means!!
However, the website does say:
If you do not believe in a Christian God, OR participate in any religious practices now (e.g. choosing to take part in religious worship) then it is unlikely that you fit into the Christian category.
That to me is trying to lead people who don't practice towards ticking "no religion", which just isn't necessarily true.