Let's take a look through a US lens at. Do you agree that it is true by all realistic measures that Joe Biden won the last US presidential election fairly, and not through electoral fraud?

Do you think that Covid-19 was a serious pandemic, effectively mitigated by vaccination - at least before omicron?

Do you think it is fair that sources that consistently claim the opposite should be deprecated by a resource that espouses factual content?

If so - that's most, if not all of the US source deprecations explained.

Can you think of a similar non-factual conspiracy that has infected substantial numbers of left wing sources?