Firstly you'd have to reverse the purges after the failed red river land redistribution campaign was halted by the "revisionists." Red guards in the party basically massacred all non-Maoists in extralegal acts. The 1959 anti-landlord campaign cemented the cultural revolution in the VWP (North).
At the same time the relatively tame*1 Diemist policies caused the VWP (South) to go to war or die. Their response to Diems laws escalated the system of political reprisals. However, it was PAVN units in 1962 that brought disproportionate political war to the south. Not surprisingly given Diems example of how enemy combatants would be treated, amplified by PLAF/PAVN acts against ARVN, and confirmed by Korean, Australian and US treatment of PLAF/PAVN combatants the Maoist inspired VWP rained TK on captured Americans and foreign allies.
So if you compare the reciprocal / reformist attitude of the VWP(s) to the ultra/"Maoist" attitude of the VWP(n) the solution is simple, stop the DRVN going Maoist.
Yours,
Sam R.
*1 very much IC