I worry about Christian Nationalism

I have noticed an intense rise in Christian Nationalism and especially the use of it by many Catholic’s online especially on Twitter (X). It’s not even prominent in just the United States as the media portrays, I think it’s a problem in the entire west. Canada, the United Kingdom, and Europe, are all dealing with this and it doesn’t seem like our leaders really understand how dangerous and insidious this movement is. What can we Left Catholics do to combat this effectively? Pope Francis has called out this movement and tried to shut down the Latin trad mass in the US but I don’t understand how this is still growing within the church.