counterpolarize

verb2

1. •
   To become politically radicalized in response to the opposition becoming politically extreme.

   • The costly attempts to counterpolarize Caracas in Ciudad Guyana did lead to a decentralization of production but not to one of control; all headquarters are still to be found in Caracas! — 1986
2. •
   To polarize in a manner that is opposite to or counteracts a previous instance of polarization.