While the 3 liberal justices joined the per curiam opinion, they're mad that the other five justices went on to say only Congress can enforce Section 3 against federal candidates.

They wanted that question kept open which would have opened a Pandora's Box of litigation against Trump and other Administration officials arguing that they were insurrectionists and so their actions can be voided or criminal convictions Trump DOJ officials were seeking should be vacated.

Jeff Clark (former Trump DOJ) says this will be the narrative among the left saying the 3 liberals were right and the conservatives went too far to protect Trump. Of course some on the left deluded themselves into thinking the Supreme Court was going to rule on whether Trump was an insurrectionist and are claiming they punted.

Here's a thread by Jeff Clark discussing this.

https://x.com/JeffClarkUS/status/1764693883429282050