This reads a movie and should be read but ill give the TL: DR version along with some snippets

While Putin was strong arming other Russian Oligarchs to consolidate power a rich American businessman with ties in Russia naively tried to fight the corruption and got his boy killed. For revenge he got the Russian sanctions placed which put a damper on Putin and Co's money laundering abilities in the West (which Putin pettily responded with that orphan adoption ban) and Putin and co been fighting tooth and nail since they know as long as the cash stays in russia its not safe.

One of the main propagandists was the Russian lawyer who met with Trump and Kusher, so when they saying they are talking just about russian adoptions...

https://www.theatlantic.com/politics/archive/2017/07/bill-browders-testimony-to-the-senate-judiciary-committee/534864/




...I had always thought Putin was a nationalist. It seemed inconceivable that he would approve of his officials stealing $230 million from the Russian state. Sergei and I were sure that this was a rogue operation and if we just brought it to the attention of the Russian authorities, the “good guys” would get the “bad guys” and that would be the end of the story.


We filed criminal complaints with every law enforcement agency in Russia, and Sergei gave sworn testimony to the Russian State Investigative Committee (Russia’s FBI) about the involvement of officials in this crime.

However, instead of arresting the people who committed the crime, Sergei was arrested. Who took him? The same officials he had testified against. On November 24, 2008, they came to his home, handcuffed him in front of his family, and threw him into pre-trial detention

...In 2010, I traveled to Washington and told Sergei Magnitsky’s story to Senators Benjamin Cardin and John McCain. They were both shocked and appalled and proposed a new piece of legislation called The Sergei Magnitsky Rule of Law Accountability Act. This would freeze assets and ban visas for those who killed Sergei as well as other Russians involved in serious human rights abuse.

...The Russian government has also used its resources and assets to try to repeal the Magnitsky Act. One of the most shocking attempts took place in the spring and summer of last year when a group of Russians went on a lobbying campaign in Washington to try to repeal the Magnitsky Act by changing the narrative of what had happened to Sergei. According to them, Sergei wasn’t murdered and he wasn’t a whistle-blower, and the Magnitsky Act was based on a false set of facts. They used this story to try to have Sergei’s name taken off of the Global Magnitsky Act that passed in December 2016. They were unsuccessful.

Who was this group of Russians acting on behalf of the Russian state? Two men named Pyotr and Denis Katsyv, a woman named Natalia Veselnitskaya, and a large group of American lobbyists, all of whom are described below.