They were just champing at the bit for an excuse to get more racist. I can't believe the utter heel turn with their border rhetoric
https://www.reddit.com/r/politics/comments/1bauos4/biden_says_he_regrets_using_term_illegal_as_trump/?sort=controversial
As proponents of (small r) republicanism, constitutionalism, rule of law (which they refer to as 'law and order'), free markets, and private property, American 'conservatives' are indeed Liberals. They just advocate for shittier public policy. There is nothing inherently progressive about Liberalism. The United States was simultaneously a slave plantation oligarchy and a Liberal Democracy.
The presence of universal suffrage and civil liberties are concessions which took centuries to extract from the Liberals, by social movements with many Communist organizers at their core. And yet under Liberal Democracy, we still have legal slavery, lack universal sufferage (felony disenfranchisment along with a vast legally constructed underclass of undocumented workers), and civil liberties which only exist if you can afford a well connected Harvard-educated lawyer.