If you're white, tear down your fence because it's racist.
According to Nick J. Sciullo, a one-time faculty member of Texas A&M University, the U.S. has a long history of using fencing materials to separate people. It's a feverish zig-zag from Trump to "some slave owners used fences" to "southern border wall" to "race riots" in order to prove beyond a doubt that fences are racist.
So, tear down your fence you white-picket-bigot. And while you're doing that, tear down the border fence as well because the people trying to cross are not your skin color so you must be racist for wanting to impede their journey. (Unless you're a celebrity, Obama, Israel, a random democratic politician, or a pitbull mommy)
Source: Racist Fences