The core foundation of liberalism is capitalism.
They are the party of merchants and lawmakers
that rebelled against against the kings and theocrats of their time.

Since the US has just two parties by design, it makes both parties tent parties,
that is to say that there's multiple parties of different ideologies inside the party.

The way I look at it is that the US democratic party went from
white supremacist to social democratic (Kennedy) to liberal (Clinton).

Republicans are currently dominated by Zion-Anglo male supremacist racists together with other pro-white racists.

Why are you under the impression that only ***pro-***white racist are alt right and all other kinds are liberals?

Because most other kinds are being suppressed by the pro-white racists, so they're not going to join the Republican party.
One of the few that still joins forces with the Republicans, for example Zionists or Falun Dafa, assume that they can rule over them.

You can hate whites. Mexicans. Jews. Men, etc. Any support of group discrimination is right wing by its definition because liberals specifically is against bigotry.

It's socialists that are against bigotry.
Liberal are just capitalists.