If you wish to know about the ignorance of the Arabs, refer to Surat-al-Anam after Verse No. 130:-- Indeed lost are those who have killed their children From folly without knowledge and have forbidden that which Allah has provided for them, inventing a lie against Allah. They have indeed gone astray and were not guided.' (6.14)  

أَنْ تَعْلَمَ جَهْلَ الْعَرَبِ فَاقْرَأْ مَا فَوْقَ الثَّلاَثِينَ وَمِائَةٍ فِي سُورَةِ الأَنْعَامِ {قَدْ خَسِرَ الَّذِينَ قَتَلُوا أَوْلاَدَهُمْ سَفَهًا بِغَيْرِ عِلْمٍ} إِلَى قَوْلِهِ {قَدْ ضَلُّوا وَمَا كَانُوا مُهْتَدِينَ}