Only 2 things motivate people to extreme measures in this world, Anons.
Love and Fear.
To get the GOP electors to face potential death for casting their votes for Trump means they either love Trump to such a degree they would risk life, or they fear what not casting their vote for Trump would mean to their life.
They know they would face charges of treason for certifying a fraudulent election. It's either that, or they love Trump more than they love breathing.