Examining social media spreading disinformation is interesting and should be done.
If you think that the fervor with which this is being done isn't being pursued due to a narrative that it caused Trump to win, you're being very naive.
I also resent the fact that you are insinuating I CALLED black people poor and helpless. I didn't. I simply characterized a belief that I believe many pushing the Russian meddling are running with: That these campaigns were not only run (of course they were) but that they were persuasive enough to have had an effect on the outcome of the election.
You aren't wrong about all classes being susceptible to propaganda. I've been shocked by how many well-off people I work and socialize with (fellow left thinking people) have begun to resemble the right-wing people I witnessed for years jumping to conclusions about the fake-scandal that was Benghazi.
Rational people who latch onto rumors as facts.
Steve Bannon = White Supremacist (he's not, just an asshole)
Donald Trump being blackmailed by Kremlin with tapes of him with hookers (zero evidence)
Russians hacked voting machines in key states (zero evidence)
Russian ads on social media influenced voting outcomes (zero evidence)
I want to point out that none of these are things that sway people's existing opinions. They are all just confirming their existing biases.