Borderless world? You mean like the one your God created?
Unlike Trump he seems to have skipped the wall part.
Caution: When you see someone using the expression: "your God", you know that someone is an atheist, who is hypocritically invokes His name.
If that atheist favors a borderless world, would she favor her home to be without locks on the doors and windows? Would she welcome everybody in her home, uninvited?
Perhaps it does not have to be a wall. Although wall seem to be working perfectly between Israel and the Arab hoards. A wall worked perfectly in Berlin in the day.
The Iron Curtain was not a wall but a fence, land mines, watch towers with well armed and properly instructed border guards. It worked perfectly.
Mind you, it was intended to keep people IN not OUT.