That modern Democrats rewrite history does not prove your case. In the past, these big city titans of finance and globalism were called "Republicans."
Only the names have changed. The people doing these things still pretty much live in the big coastal cities, same as in 1861.
Only after CW, before that they were all Democrats and political allies to the greatest international traders of their time: cotton growers.
Indeed, even after CW before 1900 New Yorkers voted Democrat more often than Republican -- beginning in 1868 New Yorkers again allied with Southern segregationists.
Of course, New Yorkers liked progressive Republicans, and voted for them consistently from 1900 until FDR in 1932, but since then it's been Democrat all the way.
The last Republican to carry New York was Reagan in 1984.
Bottom line: nearly all these great evil-doers who so, so vex your mind were then, are now and will continue to be Democrats, not Republicans.