Oh they can SAY they're putting it back up because of their fear of old fat white Americans with US flags and red hats, but what they're REALLY afraid of is the THOUSANDS of
T-E-R-R-O-R-I-S-T-S they themselves have flown in or busses around the nation unvetted and let loose across the country.

That's their fear.
But the D H S will tell you no, they aren't concerned about those people. They're only concerned about white males who drive pickup trucks and own a boat and go hunting for deer or rabbit and go to church on Sunday. That's what they want you to believe.