Actually, it seems that the war is considered 'a war on religion' by the religious right, because they cannot be allowed to decide what other people - mainly women, but also others - should be doing. If I had the energy, I would post a shit load of links to shit I have been reading for months about this.
It has to do with abort, yes, but also with prevention of pregnancy, health, and the right to a sex-life and a job.