Badr jangidan oldin yahudiylar musulmonlarni mensimasdilar. Badr jangida musulmonlar g'alaba qozonganidan keyin ularning mensimasligi va nafrati yanada kuchaydi. Ular imkon topgan har bir fursatda musulmonlarga qarshi fitna va makr-hiyla uyushtira boshladilar hamda ular bilan tuzgan shartnomani buzishdan hech qanday tap tortmadilar. Yahudiylar chegaradan chiqqan har safar musulmonlarning javobi qattiq va qat'iy bo'lardi. Yahudiylarning fitnaga oid tipik voqeasi Banu Qaynuqa' bozorida yuz bergan hodisada aks etadi.

The Jews had held the Muslims in contempt before the battle of Badr. Ever since the Muslim victory their contempt and hatred increased all the more. They began plotting and scheming against the Muslims whenever they had the chance, and cared nothing about breaking the treaty that they had signed with them. The Muslims’ response was harsh and firm everytime the Jews stepped out of line. A typical tale of Jewish mischief is reflected in the incident that took place in the market of Banu Qaynuqa’.

Bir musulmon ayol o yerga borib, zargarlik do‘koniga o‘z bezaklari bilan o‘tirdi. Bir yahudiy orqasidan yaqinlashib, ko‘ylagining orqa tomoniga tikan bilan mixladi. Ayol o‘rnidan turganda uning kiyimi yechilib ketdi, yahudiylarning hammasi uni haqorat qilib kulishdi. U yordam chaqirdi, yaqin atrofdagi bir musulmon javob berib, o‘sha yahudiyni o‘ldirdi. Shundan so‘ng yahudiylar bir joyga to‘planib, musulmonni o‘ldirishdi. Shahid bo‘lgan musulmonning oilasi musulmonlarni yahudiylardan qasos olishga chaqirdi, ular shunday qilishdi va ular o‘rtasida jang boshlandi.