Right wing populism is based on the projection of repulsive acts by the MAGA king, and other Repubs, on to Dems generally and Biden specifically.
We just learned new details of how Trump corruptly lined his pockets with money from foreign countries, like China, who were negotiating various matters with the US while Don was prez. Exactly the kind of thing the Emoluments Clause was designed to prevent. The projection, made without evidence, Biden is corrupt.
26 women have credibly accused the former Groper-in-Chief of sexual abuse. The projection, Biden is a pedophile.
The House 1/6 committee revealed numerous instances of how Don used the DoJ to go after his perceived political enemies. US Attorney Geoffrey Berman was pressured by Trump to prosecute enemies. House Repubs, especially Gym Jordan, has used his committee chairmanship to weaponize the Judiciary Committee. The projection, the investigation and prosecution of Trump, approved by various grand juries, for numerous alleged crimes is an abuse by Biden.
These aren't the only examples. Repubs have also accused Dems of stealing the 2020 election, projecting Don's traitorous act on to the opposition.
Thus, projection is the means by which Repubs are able to see themselves as a force for good. They have chosen to defend a serial sexual abuser who has corruptly benefited financially from his time in office and tried to steal the election by projecting the exact crimes he is guilty of on to Joe Biden.