What’s wrong with Niall?!

My dog, Malachai, is literally terrified of Niall Horan. I just got a magazine and when I open up to a picture of Niall, he flips out and starts barking and backing away. Now if I show him a picture of Harry or Liam, he’s completely fine. But if I show him Niall he freaks out. He looks playful in the pictures, but he seriously hates Niall.