The little I know,
“The reason that Liberalism has become a Disease is because it is limitless in its scope.”
Define “Liberalism” – I imagine we might largely agree with respect to socially liberal issues as in your example. But if someone has a different opinion than you do regarding, say, the role of the Federal Government vs. the states, the degree of economic assistance offered by the government, or the amount of tax citizens should pay, etc., would you also label those different opinions a capital-D Disease?
“The labeling of anything Trump does as evil is an extreme position, and this is detestable.”
Yeah, those are partisans, and both parties have ’em.
“In fact, his immigration policies were actually stated openly by Bill Clinton, Obama, and numerous Democrat politicians in Congress.”
Really? Which previous administration called for the building of a wall and getting Mexico to pay for it? Which previous administration called for extrajudicial removal of asylum claimants?