Now? You do realize that the current president is the ringleader of birtherism, right?

Hillary Clinton, in her 2008 presidential campaign brought the fringe conspiracy theory of 'birtherism' into the mainstream as a rhetorical weapon to discredit her rival, Barack Obama, at least in the eyes of enough potential voters to do some harm. Donald Trump did bring the matter up in his campaign, but quickly repudiated it and never mentioned it again. It does not look like a sustainable assertion that Trump is, or ever was the 'ringleader' of 'birtherism.'

Of which there was concrete proof of election meddling by Russia. Obviously we can't litigate what-ifs, but I'm not sure how the two can be separated.

>Stacey Abrams was the actual winner of the 2018 Georgia gubernatorial race.

The guy she was running against was the secretary of state at the time and passed several laws that were very clearly meant to suppress voter turnout before an election that he was standing in.

>Now Republicans are the devil for not accepting this election?

Yes, and for inciting violence and beating a police officer to death with a flag of the steps of the Capitol while saying the pledge of allegiance. Either work to make sure it never happens again or be inextricably linked to it.