This verse comes after mentioning the day of judgement and the resurrection because there is a very dangerous group in the society, that is of the hypocrites. They are the most dangerous party in a society. As mentioned before, the Holy Qur’an in most of the verses indicate the hypocrites to warn the believers from their danger, since they are hidden unclear enemy for humans and they are the major cause of destruction in community. Certainly, it is easy to treat with clear truthful people while it is not easy to treat with unclear fluctuating ones who changes their modes, opinions and principles, they are as described by Allah (swt):

 مُّذَبْذَبِينَ بَيْنَ ذَٰلِكَ لَا إِلَىٰ هَٰؤُلَاءِ وَلَا إِلَىٰ هَٰؤُلَاءِ ۚ وَمَن يُضْلِلِ اللَّهُ فَلَن تَجِدَ لَهُ سَبِيلًا

(Wavering between them, [belonging] neither to the believers nor to the disbelievers. And whoever Allah leaves astray – never will you find for him a way.) (An-Nisaa: 143)

(… فَمَا لَكُمْ فِي الْمُنَافِقِينَ فِئَتَيْنِ ) (What is [the matter] with you [that you are] two groups concerning the hypocrites …): This is rhetorical question about this issue which was in al-Madina society, for the people differed in the way of dealing with them, as the case in every age.

So Allah (swt) asks the believers to be one party with one opinion about the hypocrites and that they should not keep silence about them, rather the society should confront them and reveal their hypocrisy.