Really bad example by Maher.
There are much better examples where the 2 parties are frustratingly aligned to a large extent. For example, datacenters, ICE, and foreign policy. You can find a good number of democrats who are mad about Iran not because it's a dumb war, but because it wasn't done correctly by going through congress.
Both sides are aligned pretty closely in making their donors happy above their voters. That keeps democrats from regulating like they should and it keeps republicans focused on "the enemies within".
Maher himself is a perfect example of this. He's a hardcore Zionist warhawk who has an ideology nearly identical to Ted Cruz, yet he's a "liberal" (neoliberal). He also had Democrat Van Jones on his show making fun of dead Gaza babies. While I don't think the media and politician class represent the public (at all!), they are as aligned as lasers on promoting Israel.