Comment: O: "At the time of the Iraq invasion, Trump was not a politician and much more likely to let his true inside be known."

Well his 'true inside' at the time was support for the invasion. Tepid support, but support nonetheless.

O: "I believe him when he says he did not support the war since demonstration thereof requires action. . "

By definition, answering a question on a nationally-syndicated radio show constitutes taking an "action." 

The funny thing is that this is such a stupid issue. When asked, Trump could have said, "At the time, I was sort of for it but I wasn't really sure." Presto! No issue. Everyone would have understood because that was the mood of the country at the time. But for some reason he just isn't wired that way.