http://www.nltimes.nl/2016/03/21/swan-killers-attack-animal-rights-activist/
“Swan protector Saskia van Rooy was attacked by hunters in Stolwijk on
Saturday, she said to Dutch newspaper AD.
“According to Van Rooy, she was filming dead geese when two men were
suddenly behind her. “Dressed in army suits and camouflage nets over
their heads, they yelled at me”, she said to the newspaper. One swung
the butt of a rifle towards here face, but she managed to duck in
time.”

It’s because they are all inbred savages, all hunters are.
Guess they thought she might get in the way of their killing spree.