Ending a 6 year friendship ? Advice

Cutting off a 6 year friendship? Need advice if you have gone thru this

am I wrong for cutting off my best friend after this election? Some backstory she’s currently in the military (as a result a lot of them tend to be trump supporters) it was brought to my attention that this election she voted for Trump (every election). I’m heartbroken. Her parents are both undocumented . She was barely able to grant her father a path to citizenship which leaves her mom as the only illegal member of her family. I don’t want to continue a friendship with someone who supports a man like that but I feel some guilt. When I have discussed this with some people I am told that I am being dramatic but I believe "Agree to disagree" is reserved for things like "I don't like coffee." NOT racism, homophobia, sexism. Not basic common decency. Not human rights. It IS personal. We have a difference in morals and I do feel differently about her.

Please advise .. anyone who has been through this is greatly appreciated it