I believe you are sincere. But "is about to be a huge, costly, global train wreck" lacks the nuance of "are you sure this is right?" and will rub some people the wrong way.
Edit: I'm not suggesting you should have written it any differently. I think you made the right choice to be a bit provocative because it grabs the attention that's needed.
Edit: I'm not suggesting you should have written it any differently. I think you made the right choice to be a bit provocative because it grabs the attention that's needed.