If what you’re trying to suggest is that Trump supporters were “shy” with pollsters because they were afraid of having to face negative social consequences for their political opinions, that seems to be an incorrect inference:
So no, if polls undercounted Trump voters equally in pro-Trump and anti-Trump communities, that indicates that the undercounting was not due to Trump voters’ fear of being socially penalized for their views.
And I repeat: Denouncing malicious lies, incompetence, corruption, reality denial, delusion and bigotry does not constitute unfair political persecution or “intolerance” of the partisans who support malicious lying incompetent corrupt reality-denying delusional bigots.
Public discourse in a functioning democracy requires reasonable standards of factuality, transparency, honesty, fairness and critical thinking. We can’t just throw out those standards because we’re worried about hurting the feelings of supporters of Trumpism and other ideologies of malicious lies, incompetence, corruption, reality denial, delusion and bigotry.