Petty Grudger
Of course God is our Father/Mother and loves us unconditionally. Your love for your own children is but a dim reflection of the love that God has for us. Your problem is that you have accepted the warped view of God presented by the writers of the old testament books. Here is a quote from A Course In Miracles (p.261, Ed 1)
"You cannot understand how much your Father loves you, for there is no parallel in your experience of the world to help you understand it. There is nothing on earth with which it can compare, and nothing you have ever felt apart from Him resembles it ever so faintly. You cannot even give a blessing in perfect gentleness. Would you know of One Who gives forever, and Who knows of nothing except giving?"
It is we who have blocked the awareness of God's love from our minds because we do not feel worthy to receive that love. We are like the returning prodigal son who wants to be made one of the hired hands because of his shame and guilt. Do you not remember what the Father's response was? He ordered the ring to be placed on his finger and the robe placed around his shoulders and directed that a banquet of rejoicing be prepared.