This is your opinion. And it is nonsense, for the following reasons;
A) Not all people who are opposed to abortion on demand are religious.
B) If the religions you refer to were 'crackpot' they would by definition be minorities and therefore it wouldn't matter to either party if they offended them.
There is a serious ethical question over life and death and the sanctity of it.
Just because someone doesn't hold the same view as you do on such an emotive subject you can't simply label them all as crackpots.
There are doctors, lawyers and politicians opposed to abortion are they all crackpots as well?