Moses changes gods mind

Numbers Says, “14:12 I will smite them with the pestilence, and disinherit them, and will make of thee a greater nation and mightier than they.

14:13 And Moses said unto the LORD, Then the Egyptians shall hear it, (for thou broughtest up this people in thy might from among them;)

14:14 And they will tell it to the inhabitants of this land: for they have heard that thou LORD art among this people, that thou LORD art seen face to face, and that thy cloud standeth over them, and that thou goest before them, by day time in a pillar of a cloud, and in a pillar of fire by night.

14:15 Now if thou shalt kill all this people as one man, then the nations which have heard the fame of thee will speak, saying,

14:16 Because the LORD was not able to bring this people into the land which he sware unto them, therefore he hath slain them in the wilderness.

14:17 And now, I beseech thee, let the power of my Lord be great, according as thou hast spoken, saying,

14:18 The LORD is long-suffering, and of great mercy, forgiving iniquity and transgression, and by no means clearing the guilty, visiting the iniquity of the fathers upon the children unto the third and fourth generation.

14:19 Pardon, I beseech thee, the iniquity of this people according unto the greatness of thy mercy, and as thou hast forgiven this people, from Egypt even until now.

14:20 And the LORD said, I have pardoned according to thy word:”  Now why would a god who supposedly knows everything have to have a mere human figure that out for him?  I thought he knew everything.