for "America wants" language, that doesn't mean anything. Different people have different goals.
Sure, it's shorthand, but the idea is that the Democratic Party might nominate a presidential candidate who has harsher views about Muslims and Palestine, if they see those views being the reason they lost, or among the reasons they lost.
They would see that they had the "better" policies and still didn't get the votes from the people who care most passionately about them, so their approach did not work. Maybe they go closer to the protesters view to try to get their votes, or maybe they give up on the protesters as a voting bloc since they couldn't even get their vote when they had the "better" policies. That would entail going further away from the protesters views.
Either could happen, I don't know the polling, but my point is that it isn't just "we will take 4 years of Trump to make our point and make Democrats listen," they may be taking 4 years of Trump and then proving that no one should align their policy views with theirs going forward because it hurts more than it helps.