Maher is wrong on this as he so often is on other issues.
First, the Republicans haven't turned their backs on Trump, even if he's getting a small percentage drop in his support. At the CPAC conference last weekend, Trump was by far the straw-pole favorite to be the GOP nominee in 2024.
Second, There are still plenty of Republicans in positions of political power and influence who continue The Big Lie and constantly insult anyone to the left of Genghis Kahn. For example, Marjorie Taylor Greene, Loren Boebert, Matt Gaetz, Louis Gohmert, Sarah Palin, Paul Gosar, Josh Hawley and Rand Paul-- among many others-- have recently made many disparaging and nasty or insulting comments about Democrats and President Biden. Why in the world should we respect or compromise with them?! Get real, Bill.
Lastly, Republicans around the country at the state level have been furiously rewriting their voting laws, gerrymandering their voting districts, purging their voting lists and creating legislative ways to overrule the will of the voters. They know they will lose elections if there are fair, open and honest elections. Maher expects us to be magnanimous? Fuck them and fuck Bill.
Perhaps Maher has a good point about the way to engage with our enemies after they are defeated. But the political war in the U.S. isn't over yet. It's way too early to be accommodating to the traitorous Republicans who haven't demonstrated a drop of contrition. Maybe later but otherwise our fight continues.