I think the problem is that many pagan religions tolerate other pagan religions including christianity. But christianity tolerates none, at least insofar as only after christianity has stolen some tradition or teaching. Once it has become a christian thing it's okay now. Christianity is definitely a racist religion.
That used to be true. But now Christianity is as liberal and accepting as Paganism used to be (or is).
Racist? You can accuse Christianity of many things. But surely not racism? The guy who influenced Christianity more than anyone else was St Augustine of Hippo. A black guy. This has been universally uncommented by Christians throughout the ages. Which tells you how little with upset Christians. Jesus was a Jew. Christianity has a long history of antisemitism. But their problem with Jews has for most of history been for their lack of embracing Jesus. If they would convert there wouldn't have been a problem. When Isabella of Spain banned Jews from Spain all they needed to do to stay was to convert. Martin Luther was for extreme harrassement of the Jews. But his expressed goal was to harrass them into joining the wider Christian community. Not exterminate them.
The antisemitic racism we associate with, for example, Nazism, is a result of the enlightenment. It has to do with very enthusiastic scientism being crowbared into Christianity. That's just a bizarre and pretty late development. It's a weird blend of a worship of thinking and reason with anti-intelectualism/faith first thinking. Just rediculous in every way.
Early Judaism was overtly racist. But when they were conquered by Assyria in 720 BC they re-interpretted the Torah as this Jewish kingdom not being a litteral kingdom, but a spiritual one. Then Persia conquered it in 539 BC and Cyrus the Great gets named the first Messiah by the Jews. At this point Jews are extremely NOT racist. They were very happy about being ruled by Persia. Jews had a lot of autonomy and were left to worship as they pleased.
In 312 BC the Greek Selucid empire conquered Israel. This was a very heavy handed rule. They forced the Jews to worship Dyonisus in parallel to Jehova. The Greeks were incompetent administrators and Greek rule was dysfunctional, corrupt and chaotic. They were so shit that the empire shook itself apart from within. In 110 BC Jews managed to gain indipendence (for the first time since 720 BC). The ruling Hasmonean (Jewish) dynasty was super racist. The pro-Jewish racism was used as the glue to fight the Greeks. But that same extreme racism became dysfunctional when the Romans took over (37 BC). Following the Jewish uprising of 70 AD this new racist streak was obliterated from Judaism.
This evolution can be tracked in the Old Testament. It's all in there.
Modern paganism is a modern invention. It's got very little to do with ancient paganism. It's a religion for nerdy alternatives. There's also barely a community to speak of. Besides the rituals it's just a bunch of palls hanging out. Until a religion acts as a glue for a community, I don't think it can count as an active religion. Just the way I think of religion. To me religion isn't about beliefs as much as it is a description of a behaviour.