Complex sentence: Affirmation of the Kalimah is the first of the five pillars of Islam and belief in the meaning of the Kalimah is the primary distinction of what defines a Muslim, and recitation of the Shahada (based on the Kalimah) is the Islamic declaration of faith.
Split into simpler sentences: Affirmation of the Kalimah is the first of the five pillars of Islam and belief in the meaning of the Kalimah is the primary distinction of what defines a Muslim. Recitation of the Shahada (based on the Kalimah) is the Islamic declaration of faith.