Is Religion an Ideology?

I have heard Islam called an ideology so I suppose it is one, especially allied as it is to politics -there is no separation in Islam and it was only a few centuries ago that Christianity had the same status as a State religion -(and was equally barbaric before it was reformed) and is ergo an ideology as well.

When the essence of Christianity is altruism,self sacrifice, symbolised by the image of Christ on the cross dying supposedly for everyone's sins with the explicit injunction that believers should take up their own personal cross and follow him which is the exact self same philosophy behind all the collectivist ideologies of the 19th and 20th centuries from Nazism -sacrifice for the Fatherland the Aryan race and tribe,Communism -sacrifice for the Motherland,the common good and Socialism sacrifice for the poor,working class,common welfare it is clear that religion and collectivism are ideological peas in a pod -choose your form of sacrifice and self immolation.

So the likes of Jordan Peterson have nowhere to hide when he seeks to disparage the Marxists and co by calling them ideologically possessed when he suffers from the same pathological plight with its same identical philosophical roots -self sacrifice as a moral duty.