I can’t say for sure, but I’m guessing the “cons” as you put it tended to post more trollish type stuff, peddle conspiracy theories, anti science stuff when it came to the pandemic, “fine people on both sides in Charlottesville” stuff, some totally untrue stuff about Trump being a great businessman, birtherism and spreading other outrageous and verifiable lies that Trump said over the years.
Once fact-checked, weighed, measured and found wanting, the Mods did what Mods do: they cut out the rabble rousing riffraff trying to spread conspiracy theories and untruths.
The reason why (supposedly) there weren’t many liberals banned (temporarily or otherwise) is simply because they didn’t post inane and verifiable falsehoods. Their positions were easily defended and they also were quick to call out the BS from the right. The mods simply came down on the side of truth, law and order and equality under the law. (By that I mean the “cons” broke the board rules more so than the “libs”)