As before, the clip was edited to cut off important context for Biden's statement. Where the manipulated video shows him saying "we can only re-elect Donald Trump," the unedited piece shows him saying "we can only re-elect Donald Trump if in fact we get engaged in this circular firing squad here," referring to the heated debate between supporters of Democrat candidates.
Like with earlier clips twisting footage of Nancy Pelosi, Facebook has stopped short of removing the video outright. The Biden campaign has already blasted Facebook in the past, and portrayed this latest incident as symptomatic of a "national crisis" that reflects Facebook's willingness to enable the "spread of vile lies" for the sake of money. However, Facebook appears to be trying for a balance between accountability for false claims and dismissing allegations of an anti-conservative bias. In that light, it may be less about profit (although Facebook isn't averse to running false ads) and more about minimizing the chance of a political uproar.