"See also http://www.exposethesplc.blogspot.com/ HatewatchWatch by Scott Lively. 

 has been adding the following line to the article:
See also HatewatchWatch by Scott Lively.
Aside from the fact that we don't have these kinds of "See alsos" to outside websites at the bottom of sections, it's quite obvious that the link itself fails both WP:SPS and WP:UNDUE. WP:SPS is very clear that we may use blogs as a source if and only if the author is "an established expert on the topic of the article whose work in the relevant field has previously been published by reliable third-party publications". Lively, a Christian minister, does not clearly have an expertise in the SPLC, nor is there any evidence he has been published on the topic by reliable third-party publications. (talk)