The sad irony is that a century ago it was the Humane Society that took the lead in reforming child labor laws. Now, they support denying children the right to even be born.
Various animals welfare groups have called themselves “Humane Society’s but they have nothing at all to do with this group.
This group just trades on the name “Humane Society”. They know the public will associate them with an organization that has done good works just as you did in your post. This group was founded in the 50’s and has always been an animal rights group. Therefore this position (human hating) is very much in line with their original goals.