The post answers the Democrat's idiocy with actual science.
Can a rock, placed on a trajectory that intersects with the Earth's surface, totally fuck shit up? YES. There's no question about this.
Is it a trivial exercise to do that? NO. The rock needs to be large, it needs to have a significant amount of kinetic enerty imparted to it to get it onto that trajectory.
Does it have to be a very large rock? YES. Post says it needs to be about 105,000 long tons to have the predicted impact energy (equivalent to "hundreds" of nuclear weapons), and at a typical density for lunar rock of something like 2800 kilograms per cubic meter, we're looking at a cubical boulder some twelve feet on a side, for an impact energy of a hundred Fat Man bombs, about 1.5 megatons.
We don't have any way to accelerate any rock, even one in orbit, of that size, to place it on an Earth-crossing trajectory or even move it off of one. We do not have a rocket booster or motor or anything which could significantly alter the trajectory of a rock that size. Just boosting such a rock from the Moon's surface would be a massive undertaking, requiring dozens of launches from Earth to get the required men and materiel to the Moon.
"Ms. Wu blamed criticism of her on sexism: 'that’s the danger of being a woman on the internet!' she exclaimed."
No, that's the danger of being a complete fucking idiot on the Internet, you dumbass.