We all know what truths and specific ideas those terms encompass. Stating them brings a flurry of downvotes. Even pointing in their general direction gets downvoted.
People claiming that their ideas about those areas are "truths" can lead to a lot of downvotes, yes. Those people then claim that others are "suppressing the truth". They never seem to even consider the idea that their "truths" may in fact be mistaken.
Pretty much every comment on every subject comes down to someone claiming that their ideas are truths, though, and not every comment gets downvoted so much.
Not every wrong idea has a history of being contradicted so frequently, either.