People fetishize civil war but it would take much more than those issues to cause one. You aren’t going to massacre the neighbors because your insurance premiums were to high this year. They are very solvable.
Every 50 years or so we shuffle around the groups that make up the parties. In the 60s and 70s it happened with the southern Democrats moving to become Republicans. In the early 1900s and 1910s it was Republicans breaking up and moving to independent parties.
Trump and social media are the primary issues with politics today. I think Trump will be the nominee but he will loose, there just isn’t enough support from moderates for him. Social Media is something the entire free world is grappling with.