*note: This post mentions President Trump as an example. This is not meant to be, nor to invite, a discussion of what anybody thinks of President Trump. If this thread degenerates in to a discussion about Trump, I advice moderators to delete it.
The fact that these appear to be average citizens rather than say, all recognizable future Decepticons, along with the other reasons I pointed out, indicates to me that these are supposed to be regular citizens from all over Cybertron. There's nothing to indicate these are "Megatron's base". Megatron's base most likely is already in Tarn, where this protest is headed to.
If Megatron is a Senator, his base is going to be more than a few-score characters from 1984-1991 (unless turnout on Cybertron is exceptionally low).
Megatron's district likely includes Tarn, but extends far beyond it. (Again, I point to the Congressman that I nominally live near. We share a home town. But, their district goes far beyond that. I actually live pretty close to 3 members of Congress. Mind you, they spend their time in DC. But, you get the idea.)
For the last 10 years, candidates (Sanders, Warren, Trump) have courted extreme elements on either end of the political spectrum.
There are Green Party members who regularly evoke Julian Assange (a known criminal). Conspiratorial elements of the Green Party commonly evoke Seth Rich (an obscure Democratic operative who was murdered on the streets of DC). And, yes, the Green Party (particularly the tin foil hat conspiracy theorists) are on the fringes. But, Megatron is probably supposed to be a fringe-type who managed to get elected.
Such as? It's unusual for them to be evoking the name of someone else if we're to believe this is a cause Megatron started to push changes he wants to make.
There are older Republican voters who still venerate Reagan's "Morning in America" narrative. Similarly, older Democrats are nostalgic for the Kennedys and "Camelot". National candidates have evoked the names of dead Presidents to sell themselves and their image.
Any candidate of either party (incumbent or otherwise) who mentions Trump is using him as a way to define themselves (favorably or otherwise) relative to the President. This happens often enough that voters are sick of hearing about Trump.
I don't get the sense Megatron is actively embracing violent protesters. He seemed rather indifferent about that fact actually. His only interest, as he pointed out to Orion, was that he wants change. He just doesn't care what lengths he has to go to to make those changes.
And, that would include embracing a potentially violent base......
Read some history or current events. It is almost like that is where IDW is drawing ideas from.