At first...
At first, it says: " Verily those who reject faith, and die while they are infidels, upon them shall be the curse of Allah, (of) the angels, and (of) mankind all together." This group of infidels, similar to the aforementioned group, are involved in the curse of Allah, angels, and people, too. The difference is that this group, because of their continuous insistence on being faithless, can not have a way to return to the right path.
36 * * * * Then, it adds: " Abiding therein forever, the torment shall not be lightened for them nor shall they be given respite." * * * * Since the principle of the Faith in theism can put an end to all these misfortunes, in the last verse of this group of verses, it says: " And your God is One God. ..." Again, to emphasize more, it says: "...
There is no god but He;..." Then, at the end of the verse, as the reason for that statement, it adds: "...He is the Beneficent, the Merciful." Yes, only the One, Whose general mercy encompasses all creatures, on one side, and on the other side, Whose specific Mercy reaches the true believers, deserves servitude, and no one else.
Then, here in this verse, there is the reason and evidence to prove the existence of the Providence and that there is only One God, the Glorious. He, the Almighty, is the cause of all causes and the source of knowledge, power, order, and regularity.