One of my friends has already commented that "follow to the gates of Hell" is a statement of allegiance and devotion -- as in, "I'd follow my sergeant to the gates of Hell in battle."
"Pursue to the gates of Hell," or "bomb them to Hell" might have been what he meant to say. Or, perhaps Slow Joe Biden has accidentally let slip his true feelings.
Either way, another Bidenism.
One is also left to wonder if Biden knows that his boss might consider this "a strategy" i.e. "Sorry Joe, we don't have one of those yet."