Explanation of Surah Al-Kausar

This surah is related to death of Hazrat kasim and Hazrat Abdullah who died at  Mecca and infidels had joyfully expressed that the prophets were cut off and  that with  his death, he would be completely forgotten. They also alleged that the  Prophet Muhammad (PBUH) had caused a cleavage among the Qureysh, and except for  a negligible few, all qureysh had ranged against him.
They also said that the  new faith was inauspicious for the Prophet and it would not benefit him. Allah  revealed this Surah to counteract their monstrous propaganda.