الْحَمْدُ لِلَّهِ الْعَلِيِّ الْأَجْلَلِ
Praise belongs to God, the Most High and Most Exalted; here the particular form “al-ajlal” is the point of analysis.
Compare al-ajlal with the familiar al-ajall. Pronouncing the two lams separately is called fakk al-idgham (undoing assimilation), whereas the established common form includes assimilation.
The discussion is not questioning the religious statement. It concerns the word's exact morphological shape and whether this separation of consonants agrees with established Arabic usage.