It died with the first Rush Limbaugh show in 1987 after the Fairness Doctrine in media was repealed. Followed by the demonizing of the Clintons in the 90's.
Civil discourse has been nothing that has ever come from the political right. Ever.
You are now witnessing the inevitable results of 38 years of right wing hate media, fostered by every major corporation, right wing billionaire, skin head white supremacist organization, and Republican politicians that have raised money off of it, ironically enough from the Evangelical Christian movement.
Grow the **** up son.