Race, religion, and region obviously divide people and bringing them together requires sustained and targeted marketing.
Disparate demographic groups cannot be persuaded with a singular strategy, so they must be targeted with cynical stunts designed specifically for each of them.
For instance, a brouhaha is cooked up to inflame the passions of Muslims, or homosexuals, or overweight women.
These groups have very different triggers, so the traps are successively launched as the campaign progresses in waves of propaganda. An actual crisis can also be used to your advantage by demagoguing the issue.
The goal is to portray your opponent as an enemy of the chosen group and move the group's loyalty to your side, building a coalition that is broken, but real.
The tricks are built on half-truths or completely manufactured, but this method of exploiting human frailty with psychological warfare has been proven to be effective.