I’d say that entire list is probably just as rabid leftist as Miley.
I didn't recognize most of the names, but I thought Tim McGraw was Country, and therefore figured a number of the other names must also be C&W as well ... which is why I wouldn't recognize them. And I figured that being rabidly pro-abortion was a non-starter for the vast majority of C&W fans. Well, at least it *USED* to be.
In 2016, two months before Trump's election, I was attending a County Fair in NW Ohio with relatives. On the venue was Cheap Trick, who have many songs I can still sing along to. I was planning to buy a ticket, which was very reasonably priced, until I went online to look up all their songs I knew in advance of the concert, and ran across several nasty anti-Trump quotes from the band.
They were bragging about how they had refused an offer from the Trump campaign to play at a rally, because they didn't want to be forced "to paint swastikas on their guitars" as a condition of employment. Scratch that ticket! That night I could hear them through the window screen of my motel room within spitting distance of the fairground's main amphitheater, and closed the window and turned up the TV.