Is there any evidence the Party was atheistic?

Question

Generally, most totalitarian regimes in history have been atheistic, shunning any form of religion and creating a cult of mass worship towards the leader(s) of the government. Does this hold true for the Party in 1984, or does the Party endorse a religion? If so, what religion?

I've done some background research on this, and I've found that Orwell was strongly against anti-Semitism. From Wikipedia:

Writing in early 1945 a long essay titled "Antisemitism in Britain," for the Contemporary Jewish Record, Orwell stated that anti-Semitism was on the increase in Britain, and that it was "irrational and will not yield to arguments." He argued that it would be useful to discover why anti-Semites could "swallow such absurdities on one particular subject while remaining sane on others."

...

In Nineteen Eighty-Four, written shortly after the war, Orwell portrayed the Party as enlisting anti-Semitic passions against their enemy, Goldstein.

Thus, obviously the Party was anti-Semitic, but what religion does the Party does follow or encourage? I'm looking for answers supported by textual evidence.

Answer 1

The Party and State appear to be atheistic, or rather fully in worship of Big Brother.

Countless other words such as honour, justice, morality, internationalism, democracy, science, and religion had simply ceased to exist.

and

'These things happen,' he began vaguely. 'I have been able to recall one instance — a possible instance. It was an indiscretion, undoubtedly. We were producing a definitive edition of the poems of Kipling. I allowed the word "God" to remain at the end of a line. I could not help it!' he added almost indignantly, raising his face to look at Winston. 'It was impossible to change the line. The rhyme was "rod". Do you realize that there are only twelve rhymes to "rod" in the entire language? For days I had racked my brains. There was no other rhyme.'

and

What was required in a Party member was an outlook similar to that of the ancient Hebrew who knew, without knowing much else, that all nations other than his own worshipped 'false gods'. He did not need to know that these gods were called Baal, Osiris, Moloch, Ashtaroth, and the like: probably the less he knew about them the better for his orthodoxy. He knew Jehovah and the commandments of Jehovah: he knew, therefore, that all gods with other names or other attributes were false gods.

Among the proles, Smith posits that religion would actually be allowed if it hadn't simply withered away and died in the absence of any religious leaders.

The sexual puritanism of the Party was not imposed upon them. Promiscuity went unpunished, divorce was permitted. For that matter, even religious worship would have been permitted if the proles had shown any sign of needing or wanting it. They were beneath suspicion. As the Party slogan put it: 'Proles and animals are free.'

Answer 2

When Winston goes into the antiques shop, he has a conversation with Charrington. He sees a picture of St Clement's Danes and knows where it is - it's a ruin in 1984. Winston does not know it had been a church - he knows, however, what a church is.

As they go on they talk about St Martin's in the Fields, which is now "a museum used for propaganda displays of various kinds — scale models of rocket bombs and Floating Fortresses, waxwork tableaux illustrating enemy atrocities, and the like."

Charrington says of churches ’There’s a lot of them left, really,’ said the old man, ’though they’ve been put to other uses'.

Winston thinks to himself - "Yet so far as he could remember he had never in real life heard church bells ringing."

Christian churches in Airstrip One appear therefore no longer to be used for religious purposes.