I am not sure how else to interpret a post wherein someone relates something personal and then the first sentence of the follow up tells them they're wrong.
What was called wrong was the generalization about the left which started the post, not the personal experience offered after it. At least, the "unless..." which qualifies the statement about wrongness only makes any sense as a qualifier to a rejection of the generalization, not the specific personal experience story, so there is no other reasonable way to interpret the post.