Anything labeling doubt, disbelief, criticism or diverging opinion “denial”, is unscientific itself and shouldn’t be trusted.
The term “denier” is an ad hominem insult, presuming someone being aware of the “truth” , but intentionally falsely reporting it to others.
Deniers therefore are accused to be scientific cheaters.
Science however is living from diverging opinions and scientific discussion. Without discussion science becomes static, scientific theory degenerates into dogma.
Its the dogmatist, I don’t trust, not the heretic.