If there was fraud show the evidence in the courts, do recounts, whatever, and go from there, if not, these cloak and dagger stories on social media (half of which likely originated in Uzbekistan or some shit), which are then picked up by the President and the more fringe parts of the right wing media, need to be put to rest. At this point the President throwing out these baseless claims with no evidence is undermining the integrity of our democracy just because it's what he wants to hear and believe.
Democrats didn't bitch and moan and claim voter fraud and some vast conspiracy when Trump won Michigan by 10,000 votes in 2016, Wisconsin by 25,000 and Pennsylvania by 35,000, those types of margins happen and it's not abnormal.
Trump demonized mail-in voting for months, told his supporters to vote in person, the left promoted it saying it's perfectly safe, so what's happening right now is exactly what people expected with in-person voting heavily leaning Trump and the mail-in (which is seemingly being counted after the in-person for the most part) heavily leaning Biden. It's also not abnormal for military votes to come in a week or whatever after election day, this has been happening for years.
Some wackjob just got popped driving up to Philadelphia vote counting locations with a bunch of guns because of the shit being spewed by the President and on social media, just like the guy who went up to the DC pizza place because he thought kids were being trafficked. That pizza guy is now in jail and regrets being duped with this bullshit, and that's the stuff that needs to stop. People need to stop being so willing to believe whatever they see pop up on their social media that reinforces their worldview, while at the same time completely ignoring anything that runs counter to their beliefs from a true patriot like Mattis.
It's a slippery slope where people start to put the country and it's foundational principles second in favor of seeking out information that reinforces the reality they prefer, and then allowing that reality to calcify and dictate how they view everything.