Sforno on Genesis 11:6/ספורנו על בראשית י״א:ו׳

1הן עם אחד, the only way I can stop them from carrying out their unanimously approved plan is to sow the seeds of discord between them. The instrument of bringing this about is to confuse their language. Basically, people’s disagreements are either religious, (philosophical) in nature, or they result from misunderstanding what they mean when they speak. These people had been of one mind in matters of religion, seeing that they had all agreed with the mistaken idolatrous philosophy shared by mankind at that time. In spite of such apparently good reasons for disagreeing with one another, they did not misunderstand each other.

2וזה החלו לעשות, and yet they all agree to begin this project.

3ועתה לא יבצר מהם, in view of these circumstances, if left alone, they would complete what they have set out to do, so that this form of idolatry they have agreed on would henceforth be something embraced by all of mankind. Not a single one of them would turn to the Creator of the universe and realise that He, and He alone, is the Creator of the entire universe. On the other hand, the opposite will occur if discord will break out among them regarding the supremacy of any of the deities versus the competing ones. In such a scenario, every nation would believe that there is one deity that is superior to all the various national deities, whose concern is only with the particular nation worshipping that deity. All the minor deities would have to subordinate themselves to the power of that super-deity. The prophet Maleachi 1,11 expresses this in the following words: ”for from where the sun rises to where it sets, My name is honoured among the nations;” כי ממזרח שמש ועד מבואו גדול שמי בגוים.