Counterpoint, this Vice documentary about Colombian villages where fucking donkeys is so normalized that even the children fuck donkeys:
https://youtube.com/watch?v=_VKWLC87Uzw
Maybe it's only a crime among white people because we're the only race who criminalizes it and prosecutes people committing it, not because other races and other cultures aren't also fucking animals. You can find countless instances of people fucking animals the world over, and it's primarily going to be the brown and black people who either tolerate it outright or don't "snitch" on each other for it, whereas white people will turn in their brothers, uncles, sons, etc. the moment they catch them fucking a dog.
Don't fall into the logical trap that the crime statistics are representations of how often an act is performed rather than how often it's criminally prosecuted. Niggers, spics, and pajeets all rape animals and it's so normal and acceptable to them that they don't even criminalize it in their countries.