It doesn’t matter if the voters are to blame. If they don’t vote for you, you haven’t reached them. Complaining about that won’t make them vote for you.
This being said everyone who is a citizen of a society has some responsibility for that society. So of course the voters have responsibility.
People give a fuck because they’re (with reason) emotionally invested in the politics of their lives, and which politicians are elected directly effects their lives. That one’s not too hard to grasp.
But while that will always be the case, people need to realize that Russian propaganda is inherently opportunistic and it has a goal of pushing us further apart from one another. There are real issues that lead to these sorts of political outcomes.
It’s not because of Russia, but the russian state is incredibly efficient at grabbing those issues and amplifying them to the point where we stop trusting our neighbors and families, thus breaking the democratic wheel.
Knowing that is part of the solution but realizing that there are actual issues that make people vote for political figures like Trump and listening to those voters without making assumptions about their morals is even more important.
edit to add: the republicans are part of America. Their voters are part of America. Just as democrats are. Trump is part of it, so is Jill Stein. Own it, learn from it, don’t repeat it. Try to understand why it happened. This is true for every country, but with different characters, other movements.