This is just needlessly SADistic and has the potential to kick off a global depression. That's how it got started in the 30s, if I remember correctly.
Tarriffs had very little to do with the Great Depression; it's a right-wing lie to blame it on tarriffs. Trade wars are not good, but they have much less effect that most people think.
What actually triggered the global depression was a banking crisis, a bit like the one in 2008. It was made possible because the banks were lending money to brokerages and gambling on stocks themselves (also a lot like 2008). This meant that an overextended stock market crashing *also* brought down the banks. This is why FDR forced banks and brokerages to separate under Glass-Steagall, which was repealed in the 1990s by Gramm-Leach-Billey. (Glass-Steagal is why stock market crashes like 1987 had no effect on the broader economy.)
Bringing down the banks destroyed consumer spending which proceeded to trash the rest of the economy.
What made it worse was that there was no backstop for the banks, until FDR's election. The "Bank Holiday" stemmed the bleeding, but the only way to recover was to follow John Maynard Keynes's prescriptions, which no government was fully willing to do, not even FDR -- until WWII.
The proximate cause of Hitler's rise to power lay in the deflationary policies of Bruenig, which caused massive unemployment and poverty. Because the Social Democrats acquiesced in the deflationary, hard-money policies, the frustrated population voted for the right-wing extremists instead.
This lesson is important -- if left-wing parties pursue hard-money, deflationary policies, they are *doomed* -- voters who aren't rich will give up on them and vote for the right-wing parties which blame everything on foreigners and minority groups. Left-wing parties *must* stay true to progressive economic principles in order to prevent fascism. It matters.
This is one reason Hillary Clinton was a terrible candidate, and why Bernie Sanders consistently polled 5 points better than her in head-to-head matchups against any Republican. Because he was articulating the left-wing, easy-money, progressive, populist economic message.