"Juneteenth" has been used for the celebration for over a century, and the name by which various sub-federal governments have recognized it, and I think a law recognizing a particular holiday probably should not rename the holiday while it does so.

That said, "Emancipation Day" has also been historically used.

It's what the holiday has been called for 150+ years, and a bunch of (likely) white politicians deciding to rename something the black community created seems antithetical to the idea of the holiday.

Reflect on why you dislike this holiday and the difference between its name and "Christmas". Language is fluid and will survive. It's fine. This is a bad take.

Precisely this. More fuel for the fire: "Thanksgiving", another portmanteau