If the theology of Predestination as Calvinism presupposes is true, then prayer would be worthless. We would be compelled to rewrite much of the Bible or just plain ignore it. The Open View is gaining popularity because it deals with scriptures like the one below.
Numbers 14:11- 20
<sup class="versenum">11 </sup>Then the Lord said to Moses: “How long will these people reject Me? And how long will they not believe Me, with all the signs which I have performed among them? <sup class="versenum">12 </sup>I will strike them with the pestilence and disinherit them, and I will make of you a nation greater and mightier than they.”
The LORD's intention is to destroy Israel and make of Moses a nation because Israel has repeatedly rejected God and has been a disappointment.
<sup class="versenum">13 </sup>And Moses said to the Lord: “Then the Egyptians will hear it, for by Your might You brought these people up from among them, <sup class="versenum">14 </sup>and they will tell it to the inhabitants of this land. They have heard that You, Lord, are among these people; that You, Lord, are seen face to face and Your cloud stands above them, and You go before them in a pillar of cloud by day and in a pillar of fire by night. <sup class="versenum">15 </sup>Now if You kill these people as one man, then the nations which have heard of Your fame will speak, saying, <sup class="versenum">16 </sup>‘Because the Lord was not able to bring this people to the land which He swore to give them, therefore He killed them in the wilderness.’ <sup class="versenum">17 </sup>And now, I pray, let the power of my Lord be great, just as You have spoken, saying, <sup class="versenum">18 </sup>‘The Lord is longsuffering and abundant in mercy, forgiving iniquity and transgression; but He by no means clears the guilty, visiting the iniquity of the fathers on the children to the third and fourth generation.’ <sup class="versenum">19 </sup>Pardon the iniquity of this people, I pray, according to the greatness of Your mercy, just as You have forgiven this people, from Egypt even until now.”
Moses pleads mercy for Israel before God, asking God to pardon Israel for her iniquity.
<sup class="versenum">20 </sup>Then the Lord said: “I have pardoned, according to your word;
God relents. It by no means makes God vacillating or weak.
The Bible is full of scriptures like these where God responds to petition.