The infighting was step 2 of the fascist plan, but it relied on a step 1: creating controlled opposition. Economically (which at the end of the day is all of the policy that matters) the republicans and democrats are no different. This is the root of all the infighting. And it’s all because of the lobbying groups. The infighting is necessary and it was created intentionally by the fascist supporters.
This rhetoric implies that democrats didn’t pass the inflation reduction act and republicans aren’t responsible for the majority of US recessions and increase in debt. Democrats are largely better from a long-term economic standpoint. Just because they’re not perfect doesn’t mean they’re the same as republicans
Infighting is required for fascism to take root (see rise of Nazis) so lobbyists and big billionaires spend enough money in politics to ensure that they get their way no matter what, which leads to infighting on the left as people believe their politicians are not doing anything to help them. This allows fascism to take hold.