God is everywhere He wants to be whenever He wants to be there because God is free. He doesn't HAVE to be an unwilling witness to every single wicked rape and murder that occurs if He doesn't want to!
Appealing to emotion. God is an infinite spirit. He is not limited by the universe, by this time-space world, or confined to the universe. The infinity of God is intensive rather than extensive, and should not be confused, as you do with your claims of pantheism (which you define incorrectly, too), with boundless extension, as if God were spread out through the entire universe, one part being here and another there, for God has no body and therefore no extension. God's immensity
is that perfection of God by which He transcends all spatial limitations, and yet is present in every point of space with His whole Being.
Omnipresence does not mean, however, that God is
equally present and
present in the same sense in all His creatures. The nature of God's indwelling is harmonious with that of His creation. God does not dwell on earth as He does in heaven, in animals as He does in man, in the inorganic as He does in the organic creation, in the wicked as He does in the pious, nor in the Church as He does in Christ. There is an endless variety in the manner in which God is immanent in His creatures, and in the measure in which they reveal God to those who have eyes to see. The omnipresence of God is clearly revealed in Scripture. Heaven and earth cannot contain Him, I Kings 8:27; Isa. 66:1; Acts 7:48,49; and at the same time He fills both and is a God at hand, Ps. 139:7-10; Jer. 23:23,24; Acts 17:27,28.
Genesis 18:20-21
And the LORD said, “Because the outcry against Sodom and Gomorrah is great, and because their sin is very grave, 21 I will go down now and see whether they have done altogether according to the outcry against it that has come to Me; and if not, I will know.”
These verses destroy omnipresence and omniscience by themselves!
No wonder no one from the open theist camp that disagrees with you will respond. This interpretation, and your claims of "destruction" of omnipresence and omniscience, is embarrassing. By the same logic, your wooden literalism applied to other representations of God in the Scriptures would have us believing God has arms and hands.
The verse is rendered after the manner of men ("go down now"). To "go down now" is a strong anthropomorphism, that stresses the prudent judgment of God. God certainly saw all their wickedness, knowing full well the situation. To claim as you have claimed contradicts so many other verses of the Scriptures about what God knows, that you must accept your interpretation to be in error. The knowledge of God is clearly taught in many passages of Scripture. God is perfect in knowledge, Job 37:16, "looketh not on outward appearance but on the heart", I Sam. 16:7; I Chron. 28:9,17; Ps. 139:1-4; Jer. 17:10, "observes the ways of men", Deut. 2:7; Job 23:10; 24:23; 31:4; Ps. 1:6; 119:168, "knows the place of their habitation", Ps. 33:13, "and the days of their life", Ps. 37:18.
The verse is rendered to show God's justice in His proceedings, to set an example and instruct judges to thoroughly review a cause before them.