You miss a very important point and that is God in the OT was loving and kind. He was also just as well. The only difference is that God meeted out his judgments immediately back then. Now because of Christ he is holding back,his judgements until the end.
God is the same yesterday today and foever. He does not change. That refers to his character not necessarily is immediate actions.
Note the wording. He is the same, not acts the same. He was and is and always will be a living God. Note these verses.
You shall walk in all the way that the Lord your God has commanded you, that you may live, and that it may go well with you, and that you may live long in the land that you shall possess.
Deuteronomy 5:33 ESV
http://bible.com/59/deu.5.33.ESV
"And when the Lord your God brings you into the land that he swore to your fathers, to Abraham, to Isaac, and to Jacob, to give you—with great and good cities that you did not build, and houses full of all good things that you did not fill, and cisterns that you did not dig, and vineyards and olive trees that you did not plant—and when you eat and are full,
Deuteronomy 6:10-11 ESV
http://bible.com/59/deu.6.10-11.ESV
The Lord passed before him and proclaimed, "The Lord , the Lord , a God merciful and gracious, slow to anger, and abounding in steadfast love and faithfulness, keeping steadfast love for thousands, forgiving iniquity and transgression and sin,
Exodus 34:6-7 ESV
http://bible.com/59/exo.34.6-7.ESV
Because your steadfast love is better than life, my lips will praise you.
Psalms 63:3 ESV
http://bible.com/59/psa.63.3.ESV
So his love his spoken of and also shown over and over again to his people in the OT.
Now in the NT God is still a God of anger and judgement.
Whoever believes in the Son has eternal life; whoever does not obey the Son shall not see life, but the wrath of God remains on him.
John 3:36 ESV
http://bible.com/59/jhn.3.36.ESV
Therefore you have no excuse, O man, every one of you who judges. For in passing judgment on another you condemn yourself, because you, the judge, practice the very same things. We know that the judgment of God rightly falls on those who practice such things. Do you suppose, O man—you who judge those who practice such things and yet do them yourself—that you will escape the judgment of God? Or do you presume on the riches of his kindness and forbearance and patience, not knowing that God's kindness is meant to lead you to repentance? But because of your hard and impenitent heart you are storing up wrath for yourself on the day of wrath when God's righteous judgment will be revealed.
Romans 2:1-5 ESV
http://bible.com/59/rom.2.1-5.ESV
For you may be sure of this, that everyone who is sexually immoral or impure, or who is covetous (that is, an idolater), has no inheritance in the kingdom of Christ and God. Let no one deceive you with empty words, for because of these things the wrath of God comes upon the sons of disobedience.
Ephesians 5:5-6 ESV
http://bible.com/59/eph.5.5-6.ESV
Unfortunately, all but one of your citations represent the viewpoints of persons other than Jesus. In the only passage you cite that depicts Jesus' actual teaching (John 3), Jesus uses the word "wrath", but the context of the passage is referring to those who reject Jesus' teachings. He states that those who believe His teaching will have eternal life and those who reject His teaching will not. "Wrath" is NOT defined here. I believe that those who reject Jesus' teachings, reject life. Nothing of value is ever lost, but those who fail to create a survivable soul (through the decisions they make in life) will be terminated upon physical death.