Please point to anything that Bob Birrell or Katherine Betts themselves have written that refers to race in any way (not guilt by association).The Southern Poverty Law Center has form for smearing political opponents as racists or hate groups. See (and this is not the only lawsuit)

http://www.washingtonpost.com/opinions/the-southern-poverty-law-center-has-lost-all-credibility/2018/06/21/22ab7d60-756d-11e8-9780-b1dd6a09b549_story.html

I am no fan of racism. I think that it is needlessly hurtful to individuals, wastes talent, and stirs up animosity between groups of people. All the same, it is far less serious compared to immiserating your people (such as by forcing large numbers of them to live in tents or their cars), causing a mass extinction, or otherwise trashing your environment.