RE: Satan/AntiChrist (and his minions, Yes it’s an arguable stretch as well as being an arguable fact.
My definitions of Globalism and Nationalism must be mentioned for the sake of sense…
Globalism? Is the move to Unite all Nations into one - call it - Nation - under one Ruling Authority…
The nonsense of casting anti-globalism as some sort of Catholic doctrine needs to be corrected right now - in light of the fact that it demonizes such things as the United Nations just because it has a global scope. There is no such Catholic doctrine. There never was. It is an invention by some who want to pretend their political philosophy is in fact part of the deposit of faith in the Universal Church.
Here is what can legitimately be said
against globalism. There is the principle of subsidiarity in Catholic teaching that says that civil issues that can be handled at a local level ought to be handled at a local level rather than a higher level. Thus city ordinances are preferred over state laws and state laws preferred over national laws, and national laws preferred over world-wide entities.
Of course some issues, like standards for roads and bridges, cannot be handled well by city ordinances and are better handled by the state, or the nation, depending. And some issues cannot be handled by states alone but are better handled at the national level. And some issues, like dealing with pandemics, and such require some sort of world-wide coordination. This is what the World Health Organization, a part of the UN, does.
If at some time in the future, a global government were to arise that superseded all national laws, that would be contrary to subsidiarity. But the UN, as it currently stands, is a very loose voluntary association of sovereign nations. It is nothing like the scary story some tell. There is nothing intrinsically wrong according to Catholic doctrine with nations joining such a voluntary association.
Now when it comes to particulars about how the UN operates, one can find fault, just as one can find fault with one’s own national government. That does not mean that all national governments are intrinsically contrary to Catholic teaching. And it doesn’t mean that any global entity that sets rules for its member nations is necessarily evil.
The real discussion should be over a matter of degree. How much authority and what kind of authority is vested in a broader organization. The same is true of nationalism. It is right and proper to prefer one’s own national interests over the national interests of other nations. But by how much? This should have a limit too, because Catholics are supposed to care for the common good of all - to some extent. It would be wrong to set the level of preference for one’s home nation so high that it left the concern for the interests of other nations at zero.