Nice, what's next? Jailing everyone who ever had an abortion? Why aren't y'all americans doing that yet, if it's apparently acceptable to punish people for things they did before the supposed crime was made illegal?
Look, the legal system, and political edifice is scary as all hell to anyone actually paying attention. It's literally a game where those in power have a large warchest with which to ruin people's lives, with the only limiting factor being that someone has to do the paperwork, and that paperwork will be checked.
With technology obviating the burden of actually doing paperwork, and essentially cranking the efficiency of the bureaucratic state sky high, as well as equipping it with the tools it needs to keep the checkers/whistleblowers at bay, you've got a frightningly powerful tool poised to crush anything in it's way. These aren't the days of "no man can do much damage in 4 years" anymore.
One of the great Checks, is becoming much less of one every day. It's scary as hell.
Writing software isn't illegal. Timeline goes like this:
1. Developers write open source software
2. Open source software is deployed for money laundering purposes by other people
3. Developers who wrote software at point (1) are now being punished for something they did before the US deemed it to be illegal.
Let's say the speed limit is being decreased. Would it be fair to jail everyone who went over the speed limit in the past, before this decrease was even announced?
The 3 owning accounts of the github tornado cash org were banned or suspended. This is not a legal punishment for a crime, but github covering their own ass legally.
Github banning someone is categorically different from the US government jailing someone. You are conflating two entirely different things.
You seem to have taken the outrage bait that this tweet presented and ran with it without verifying the situation.
There are interesting things to discuss around both the precedent of the sanctions and the ability of large corporations to terminate accounts at will. However the "github is banning people who just contributed to open source and this is wrong because what they did wasn't illegal when they did it" outrage meme is misinformed, confused about how law works, and is generally distracting from all the actually important topics.
