it it still an opinion of someone who is NOT a scientist. Obama is doing nothing more than having an opinion based on the information he has received experts / scholars on the matter.
Saying someone is "dead wrong" on their opinion is no better or worse that saying someone is "complete wrong". Its meaningless because opinions themselves are NOT science.
What would be more constructive and useful to this debate would be for Ivar to take his opinion back to APS. Even better- get them published in a journal. That how is works and anyone with post-grad work knows this so either Ivar hasn't tried to do that yet or he has and has been denied publication.
He took easy path- calling attention to himself by going after someone's voice more relevant than his.