No one is going to prosecute Biden. There are no grounds to do so.
Trump, on the other hand has been fined for tax fraud. libel and fraudulent record keeping. Trump is not any sort of religious person. There is not a single photo on the entire internet of Trump in a church during a religious service. Trump used to claim that he was an atheist, and said it was an advantage, because he dd not have to act according to Christian morals.
Trump is an opportunist and a sociopath that somehow has the gift of being able to con stupid people like Mark.