Earlier this month, there was a report released by CBN News about Pinterest. There was an investigation done by the website Project Veritas that revealed Pinterest was censoring some Christian terms in search results.
You can read the full article, Pinterest Insider Reveals Company Censors Bible Verses, Christian Terms here.
The bottom line was that when searching for terms that start with “Christian” Pinterest won’t auto-complete phrases. It also won’t do any Christian terminology as trending. Pinterest has marked Christian language as unsafe.