In the surah Al-Baqarah verse 19, Allah uses a metaphor to describe the munafiq. Who is the munafiq? Munafiq is a person who in public and in community shows that he is a Muslim but rejects Islam or propagate against it either in his heart or among enemies of Islam. In other words, the munafiq is a hypocrite.
أَوْ كَصَيِّبٍ مِّنَ السَّمَاء فِيهِ ظُلُمَاتٌ وَرَعْدٌ وَبَرْقٌ يَجْعَلُونَ أَصْابِعَهُمْ فِي آذَانِهِم مِّنَ الصَّوَاعِقِ حَذَرَ الْمَوْتِ واللّهُ مُحِيطٌ بِالْكافِرِينَ ﴿١٩﴾
Or like (the one exposed to) a rainstorm from the sky, wherein is darkness and thunder and lightning; they put their fingers into their ears for fear of Allah and Allah encompasses the disbelievers.
It is apparent that the munafiq people are described as people who choose to turn their blind eyes, even though it is crystal clear and pretend not to hear, even though it is loud and clear.