That’s the point.
In Germany there was a battle between left and right back then. The economy boomed in the 20s and faltered in the 30s. Capitalists saw the threat of socialism looming just behind Poland and so they supported fascism.
The Nazis funneled billions into large businesses. It was unsustainable and morally multi-level wrong, but they skimmed a lot of profits from these agreements. They got rich, while the economy started to collapse - even before the war.
Even after the war, most of them got away. They kept much of their wealth.
I see that problem also in a kind of “contact guilt” in certain topics.
That is, if there’s any polarized issue, there’s always the liberal/left/progressive position with extremely clear boundaries to what is acceptable to even discuss. And then there’s the vast conservative-fascist spectrum. If any problem arises within that issue, even mentioning it is immediately labeled as outside of the acceptable part, simply out of fear that this could be used as a wedge against the liberal position.
That in turn alienates people, they see an actual problem and the liberal side either ignores the problem or says it’s fascist. And the actual problem never gets solved or even tackled, simply because nobody wants to touch it.
This leads to a situation where for a whole bunch of people the fascists seem downright reasonable and then the radicalization pipeline kicks in and suddenly they think Hitler might not be such a bad guy after all.
So essentially, the left feeds the right gullible people out of fear they might legitimize some of their points.
Just an example from Germany: when the first wave of Syrian refugees came to Germany in 2015, they were greeted with literally open arms. Great thing. But if you let about a million people into the country, you also need about 500k new apartments for them, the bureaucracy has to be capable of processing everything, language courses have to be expanded drastically, job trainings have to be organized, etc etc. A whole bunch of problems.
Now, what happened? Nothing. There was great fanfare, the local governments did their best, but nothing substantive happened. Nobody talked about it, because that might fuel the existing resentments. Nobody tackled the problems. And within a few months, we had tens of thousands of young men, who had nothing to do, were not allowed to work, were completely alone and had no money or social safety net. Well, of course a bunch of them turned criminal, which then fueled the resentment even more, because suddenly the fascists actually had what they hoped for: criminal foreigners. Even if the actual problem was tiny, it was the spark that ignited the fascist resurgence.