“Filubuster has its own wiki. It’s a very conservative thing.”
It was when bad legislation was something to be prevented rather than overturned.
You don’t get to pick that. The other side would disagree 180 degs.
In a large, ideological sense, conservatism opposes rapid change. The filibuster aligns with that core conservative perspective. The litmus tests du jour (immigration, abortion, Obamacare) are all ephemeral.