Is that mean? Sorry, English is not my native language. I just meant that I have to express my doubt of the veracity of the statement.

Your language is fine (I’ve enjoyed your blog posts too, never gave it a thought that English wasn’t your first language), I just thought it was unnecessarily hurtful to say they must be a phony because they didn’t know something.

But, everybody else seems to agree so maybe I’ve been had.

I didn't mean to say they are a phony, just that that statement is inaccurate/poorly thought out.

English is my native language. "I have to call out" is a perfectly fine (and polite) way to express doubt of veracity.