What do you think about letting service dogs in restaurants?

I saw this video and it made me wonder a few things. I have always liked dogs and especially well trained and disciplined dogs, but I understand that not everyone agrees with me on that. What makes a person go so crazy about something that seems to me to be so insignificant? I try to be tolerant of people's quirks, but this lady and I could not stay in an enclosed area for very long and both maintain our health.