Today I shorted it, page-103

What previous tariffs are you talking about? There have been different tariffs in place since the 18th century.
Also your statement about how much money is pouring in tells me you've never seen a trade graph with a dead-weight loss. The money pouring in is far less than the loss that is created in consumption.
In an extreme scenario, think about what would happen if everything was made in Australia. Add an extra 30% on everything you are spending. Which means you buy less goods and services, restaurants that exist now wouldn't exist, revenue for companies across the board would be down and unemployment up (this is somewhat simplified). My point is that the bad outweights the good every time. In a realistic scenario, add an extra 20% to 10% of all your purchases. Doesn't sound like a lot but the aggregate impact on the economy is huge.
Also I'm not sure what you mean in regards to putting up a wall. Still referring to a trade "wall" as you called it previously or Trump's?