Bullshit. That's a common conservative lie. Tankies are just conservatives in normal person's clothing. Every view they espouse is ultimately in support of conservatism.
Conservatism is the opposite of progressivism. Authoritarianism is on the conservative side of the spectrum and the opposite side from progressivism. Progressives (the opposite of conservatives) are very clear in despising authoritarianism. In fact, antiauthoritarianism is foundational to progressivism.
Tankies try to gaslight the normal people into thinking nazis and fascists were progressives. Every tankie talking point is based on conservative talking points and common conservative lies. Tankies are just conservatives trying to gaslight everyone.
When tankies start gish-galloping about their slanted views of history and what labels apply to whom, it becomes clear they are conservatives. Every word uttered by a conservative is deception or manipulation. Every. Word.