I said that phrase so that people that care know this article was pushed in their opinion section.

Opinion pages don't mean they lie, it means they will use facts to back up an opinion the writer is expressing. Their opinion pages have a slant for sure, but tend to be much on the rails that some other papers.

You are welcome to argue against the point WSJ editorial board (or guest writers, such as the piece I linked) is making on their pages, but outright discounting an argument because of a source is intellectually lazy. Yes, we need to discriminate by source at least some, but that should make us skeptical, not out right reject a point being made.