No, they don't.
> There's at least two anti-Trump rallies alleged to have been organized by Russia.
Be that as it may, the public assessment does not state as the ICs assessment that any part of the intervention had an anti-Trump purpose (a rally can be organized whose overt message supports a cause without the purpose being advancing that cause.)
The FBI strongly disagrees with that statement. Facebook has been proven to be used as one of the tools to achieve those ends.
Whatever the FBI or people in it believe, the public assessment put forth by the US Intelligence Community does not address interaction; it is inaccurate to attribute that as a public unanimous conclusion of the Intelligence Community.
Note that I'm not making the “no collusion” argument, hence the reference to the Papadopoulos plea. The Trump-Russia interaction just is outside the scope of the public Intelligence Community assessment, and shouldn't be described as the public conclusion of the US intelligence community.
No, they say (in the public assessment) that Russia intervened to favor Trump, not that there was interaction between Russia and the Trump campaign.
Now, there's been at least one guilty plea from the Mueller investigation specifically referencing interaction, but that's a separate thing from the public intelligence assessment.