After the migration to Al-Madinah, the struggle between Islam and un-Islam had also entered a new phase. Before this the Believers, who propagated Islam among their own clans and tribes, had to face its opponents at their own risk. But the conditions had changed at Al-Madinah, where Muslims from all parts of Arabia had come and settled as one community, and had established an independent city state. Here it became a struggle for the survival of the Community itself, for the whole of non-Muslim Arabia was bent upon and united in crushing it totally. Hence the following instructions, upon which depended not only its success but its very survival, were revealed in this Surah
At the time of the revelation of Al-Baqarah, all sorts of hypocrites had begun to appear. Allah has, therefore, briefly pointed out their characteristics here. Afterwards when their evil characteristics and mischievous deeds became manifest, Allah sent detailed instructions about them.