Jean Vanier has been an advocate and friend of those with intellectual disabilities for many decades. He is the founder of L’Arche, a community that values respect for all apart for any disabilities. You can find out more about Jean Vanier at the L’Arche site.
Recently there was a roundtable discussion with Jean Vanier and a number of theology and philosophy students. It was recorded and presented by the Unbelievable podcast (normally focused on apologetics), with Justin Brierly as the moderator.
It was a good discussion that is worth listening to. You can find it here.