I don’t think the US financial system is anything close to clean but they might be strictly hostile to Russians and the government/regulators will not tolerate that.
That boils down to US conflict with Russia. Europe didn’t have a beef in this until the Ukraine invasion.
Read Kleptopia. It’s written by a British author and mostly about the British financial/legal system.
I’m not sure how much of it is current in light of the sanctions. The big example it uses (90% of the book) is Khazakhstan.
From what I’ve read more recently, many rich/middle class folks in Latin America are moving to the US. If their businesses so much as look at drug money, and then they so much as look at an American bank, they can wind up in a US prison for a long time.
So they just move to America to get away from drug gangs.
The US does not f*ck around with criminal financing.
That boils down to US conflict with Russia. Europe didn’t have a beef in this until the Ukraine invasion.