I once heard a Trump voter say something similar during Trump's first term on one of the many occasions on which Trumpkins had to take their lumps for Trump, IIRC his exact words were "He's hurting COMPLETELY the wrong people." Pretty sure he voted for Trump a second time anyway though.
Another major factor to consider is the Trumpkins' fantastical, figuratively or even literally demonized misconception of Democrats. They believe that whoever Trump's going up against is, at minimum, an actual socialist who will confiscate all their guns. And the more unhinged types may believe his opponent is also a secret revolutionary communist, an Islamist Sharia supporter, a secret elite pedophile ring insider (not Jeff's BFF though!), or even an actual supernatural demon who smells like sulfur up close. Once someone's critical thinking and fact-checking ability is low enough to fall for such nonsense, it's easy to paint something they were already inclined to support as a better option.
"Whoever can make you believe absurdities can make you commit atrocities" - Voltaire