Here's what rhymes with infighting.

Consider these alternatives

internecine / seen feuding / including factionalism / given acrimony / testimony beset / set riven / given strife / life disarray / they feuds / groups feud / food squabble / model disunity / unity upheaval / medieval cronyism / given acrimonious / erroneous sectarian / agrarian bureaucratic / democratic partisanship / which