There is absolutely discrimination against Christians. Just not in western countries. Just ask the various oriental churches, or any balkanoid for what happened under the Ottomans.
And there is absolutely discrimination against pagans. Just look at official roman policy after the fourth century, or any number of northern crusades later.
Religious bigotry is nothing new. Another example is Jehovah’s Witnesses, who have been targeted much more recently too.
The fact that christianophobia or paganophobia are not currently affecting western societies, at this very political moment does not mean they don’t exist. Islamophobia is absolutely a real phenomenon that does happen to be the current stick to beat people with.
Bigotry is the cancerous phenomenon, not labelling it and opposing it.