Apart from the insults which have offended you, he discusses very valuable points dealing with fantasy vs. reality, and problems arising from long exposure to low-G and cosmic radiation - and insulation. You might not agree but these absolutely need to be raised and openly discussed. I'm sure they are - in professional circles.

One other thing: anyone volunteering for a one-way trip automatically disqualifies themselves from going anywhere at all except into a padded cell.

"Bile"? Anti-spacecolonization?

Bullshit. Either you're just offended by his insults (understandable), or else you just don't like challenging discussion.