sic on (?.)

• aggravate
• agitate
• alienate
• arouse
• blow the coals
• come between
• disaffect
• disunite
• divide
• estrange
• excite
• fan
• fan the flame
• feed the fire
• ferment
• fire
• foment
• heat
• heat up
• impassion
• incense
• incite
• inflame
• instigate
• irritate
• light the fuse
• make trouble
• nettle
• pique
• pit against
• provoke
• put up to
• rally
• separate
• set against
• set at odds
• set at variance
• set on
• sow dissension
• stir the embers
• stir up
• stir up trouble
• tickle
• whet
• whip up
• work up