Unless you have served you have absolutely right to make this kind of judgment. Ever talk to WWII vets? Plenty of of PTSD there, Korea, Vietnam, certainly back in WWI. Not an armchair topic.
I think you may have read his post wrong. I think you two are on the same page. I think he was saying that this generation is a generation of pussies compared to the others. Basically, the people who served back in the day were tougher and stood for more. He made the comment of today's generation getting PTSD even before they leave Basic Training.
I do not think it was a shot toward Vets as a whole.