Robb Pearson was once deeply involved in a movement that portrayed itself as a patriotic defendant of the rule of law, but was in based in a dehumanizing and xenophobic mentality.
I think this is an honest self-reflection. In parts of his testimony, you can see that he is not so much talking to the interviewer but rather of the process that took him to his change of mind about immigration:
On the second part, he reminisces on how his fellow anti-immigrants prevented him from speaking out against racism, among other things:
He now writes more reflections on our common humanity in his blog. A bit of this story reminds of the many, many conservative people who have reached out and expressed their support for undocumented students and their families. This is, once again, an important point to consider for many in that certain downtrodden political party once known as the GOP.