[Emphasis added.]
To be sure, there is great truth in this. Still, I don't think we in 2016 truly appreciate how dire the situation was in the United States circa 1931-32 politically and economically. Part of that is that those who lived through it are all now dead. My grandparents were all born around 1910, so they were young adults when the Depression hit and before they died, I did discuss the period with them. As they told it, the world truly seemed to have fallen apart. And this is from people who weren't particularly political or unusual in their views; they were all middle of the road Midwesterners who tended to vote Republican. As the Depression dragged on, people were looking for answers and as their situations grew increasingly desperate, they became less concerned where those answers came from. Some looked left, some right, but it was an unusual period in which the conventional wisdom was discredited and it was widely believed that a novel approach was needed. So, in that sense, the 1930s were unusual. Imagine if the 2008 financial crisis was still ongoing with no end in sight. If you think 2016 politics are weird, think through how things might be even weirder if unemployment was north of 15%. Unemployment at the height of the Depression was over 25%! So, no, people were not satisfied with the current order in 1931/32. They wanted change and FDR gave it to them. And even with FDR, there was still violence and there were still demagogic figures cropping up on the political scene.
While it may be an overused cliché of sorts here, it is not difficult to imagine the US spinning in a strange direction if FDR had not come around in 1932. More to the point, it is impossible to imagine the US continuing along on the 1920s laissez-faire course it had been on. Even my grandparents conceded that much of the FDR program was necessary and even they never really questioned its key assumptions.
I don't put much stock in scenarios where the US balkanizes, but I can easily see a situation where the US stagnates for a much longer period and where politics gets very ugly. I can also see a scenario developing where the US is so stuck in a bad economic situation such that its production capacity is much less than it was in OTL 1939 and the mood of the nation regarding Europe is one of indifference as people focus on fixing things at home.