Because according to Aaron Mate:
But the plain text of the Senate report contains no concrete evidence to support its conclusions. Instead, with a heavy dose of caveats and innuendo, reminiscent of much of the torrent of investigative verbiage in the Russiagate affair, the report goes to great lengths to cast a pall of suspicion around Kilimnik, much of which is either unsupported or contradicted by publicly available information.
A critical disclosure by the Mueller team during its investigation – but unmentioned in both the final Mueller and Senate reports – directly contradicts the Senate's assessment. After Mueller accused Kilimnik of having unspecified Russian intelligence "ties" in 2017, Manafort's legal team made multiple discovery requests for any communication between Manafort and "Russian intelligence officials." In April 2018, Manafort’s attorneys revealed that the special counsel replied that "there are no materials responsive to [those] requests." The Mueller team's response marked a tacit admission that as of 2019, the FBI did not consider Kilimnik a Russian agent.
In recently unsealed notes from the FBI's collusion probe, Peter Strzok – the top FBI counterintelligence agent who opened the investigation – wrote in early 2017: "We are unaware of ANY Trump advisers engaging in conversations with Russian intelligence officials."
Is all this true? Or is Mate cherry-picking the report?