Here's a nice article that puts Biden's gaffe in the proper perspective.
https://www.cnn.com/2020/05/24/politics/donald-trump-tweets-joe-biden-comments/index.html
I took the time to look at the article and here are my takes:
*Retweeted a post calling 2016 Democratic presidential candidate Hillary Clinton a "skank." - Absolutely true, no doubt about it. She is a skank.
* Retweeted a post suggesting -- contrary to science -- that hydroxychloroquine is an effective treatment for coronavirus, adding these words: "Many physicians agree with you. Also, some very good studies!" - Absolutely true, no doubt about it. Many physicians do agree and there are some very good studies.
* Retweeted a photo of former 2018 Georgia gubernatorial nominee Stacey Abrams that included these words: "She fought a tough race, kissed a lot of babies and visited every buffet restaurant in the State." - Most true, no doubt about it. She did kiss a lot of babies. Got to take Trump to task over the buffet count...I don't think she visited all of them...90 percent of them, yeah...
* Retweeted two doctored photos of House Speaker Nancy Pelosi -- one with a Trump 2020 face mask on and one with duct tape over her mouth. The tweet said: "To protect PolyGrip during this pandemic, we have developed 2 options. With the DJT option, she will be able to tongue and adjust her dentures more easily. With duct tape, she won't be able to drink booze on the job as much." - All of this is absolutely true.
* Tweeted, with no evidence or proof, that mail-in ballots will produce "the greatest Rigged Election in history." - Given all elections are rigged from the start, all of this is true.
* Retweeted an article about the death of an intern in then-Florida Rep. Joe Scarborough's office, adding: "So a young marathon runner just happened to faint in his office, hit her head on his desk, & die? I would think there is a lot more to this story than that?" - Absolutely true...He does think there is a lot more to the story...and he is not alone...
* Tweeted this unfounded speculation about the 1990s death of the intern in Scarborough's office: "A blow to her head? Body found under his desk? Left Congress suddenly? Big topic of discussion in Florida...and, he's a Nut Job (with bad ratings). Keep digging, use forensic geniuses!" - Absolutely true...Joe is a nut job, he has bad ratings, and they use TOP NOTCH PEOPLE when performing any investigation...
* Tweeted that former Attorney General Jeff Sessions should drop out of the Alabama Senate race -- accusing him of having "no courage, & ruined many lives." - Cannot say for sure, but even if this was wrong, I fail to see how this is remotely addresses what Biden said...