Kind of odd some Democrats and liberals (really stop and consider the historic connotations and political legacies that go with identifying with those terms, the true principles that tie FDR to JFK to Obama) seem near overjoyous at this development...
Is it really that surprising? Suburbanites and the urban elite have always resented rural and working class Americans. Now that the yuppies are crossing over to the Democratic Party because it's "progressive" and "modern", you'll see the party to start to mirror their feelings about the working class.
Most partisans' preferences and petty bigotries about groups change with their coalition. This is why you get Democratic writers and bloggers expressing opinions about say, coal miners in West Virginia that would never fly in 1966.
If Hispanics and White Evangelicals suddenly switched parties, you'd see partisans on both sides developing 'strange new respect' for the new members of their coalition. Meanwhile Democrats would suddenly become concerned about 'fence hoppers' and Republicans would ruefully complain about 'Bible thumpers'.
