Chris Williamson via Getty Images Portrait of Jordan Peterson at the Cambridge Union on Nov. 02, 2018.

New Zealand's largest bookstore chain has made the decision to stop selling Jordan Peterson's self-help book, "12 Rules for Life," following the horrifying shootings in Christchurch that killed 50 people a week ago.

"Unfortunately, 12 Rules for Life is currently unavailable," a Whitcoulls customer representative said in an email circulated to customers, and posted on social media.

"(It) is a decision that Whitcoulls has made in light of some extremely disturbing material being circulated prior, during and after the Christchurch attacks."

The representative went on to say that it valued responsibility to its community and that it would be wrong to support Peterson "at this time."

The chain, which has 56 stores in New Zealand and an online presence, was criticized by some on social media for being hypocritical for focusing in on Peterson as it still offers books like Hitler's "Mein Kampf."