A person who thinks only about building walls, wherever they may be, and not of building bridges, is not Christian.I understand that the Pontiff may have an exalted opinion of himself, but I would not think that he would be so full of himself that he would decide to cast Trump to the Lake of Fire all on his own. Most traditional Christians would assume that God Himself would make that decision. One would hope that the Pope has not elevated himself to that stature.
My words of advice for His Holiness come courtesy of Ice Cube:
You better check yo self before you wreck yo self
One might also question the hypocrisy of His Holiness when it comes to walls, considering that his place of residence, Vatican City, is surrounded by walls.
While I may not believe that Trump fully understands how our Constitution works, the words he proffers with regarding to protecting the citizens he would serve (whether he believes them or not is open for discussion) is something that is not un-Christian. It's simply understanding that our world is a changing place, and that a nation has a right to protect its sovereign borders.
If the Pope wants to himself in American politics, perhaps it would be best if he abdicated the Papacy, moved to the United States, and got involved in the political structure at the lay level. If he's not willing to do that, then perhaps he should simply keep his mouth shut, instead of looking to influence our political nation from afar.