I know several people working as software engineers at Cloudflare. According to one of them, this incident (blog.cloudflare.com/the-mistake-th) was hardly a mistake. Cloudflare is including block lists sourced from far right evangelical groups as part of their 'family friendly' DNS service.
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I always see people making assumptions but how about some sources and proof.
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Sources: 1 current software engineer at Cloudflare, 1 former software engineer at Cloudflare, Cloudflare's own blog post and running the `drill` command with both of those sites to see that they aren't filtered out by 1.1.1.3 and reporting it to them with no result a while ago.