The Satan sends detachments of his own in order to put people to trial and the highest in rank, in his eyes, is one who is most notorious in sowing the seed of dissension.

أَنَّهُ سَمِعَ النَّبِيَّ ﷺ يَقُولُ يَبْعَثُ الشَّيْطَانُ سَرَايَاهُ فَيَفْتِنُونَ النَّاسَ فَأَعْظَمُهُمْ عِنْدَهُ مَنْزِلَةً أَعْظَمُهُمْ فِتْنَةً