Ingoing and outgoing fluids, if they drop through the inner horizon, must drop into causally separated regions of spacetime. To do this, they must exceed the speed of light relative to each other, which is impossible. Feedback loop: Counter-streaming ingoing and outgoing fluids generate a large proper pressure. The pressure increases the inward gravitational force, accelerating the ingoing and outgoing fluids through each other. Key point: Inward = towards BH ingoing   away from BH outgoing Result: Mass inflation

  Black Hole accreting charged baryons and dark matter