Just in case you’re not convinced by photos of hordes of non-Europeans swarming into Western Europe, here is a simply way to understand the effects of open borders.
Start with a picture of a square. One has been provided. Copy it onto a piece of paper.
Now erase the square’s borders.
What happens to the square is what happens to a country if you erase its borders.
If you can still say, after that, “We don’t need no stinkin’ borders,” you’re a Democrat and there’s but little hope for you.