Do you think that the prayers preserved for believers in the Psalms are evil?
Would God put evil prayers in his word to man?
Are believers allowed to express their hurts and injustices to the Father?
Those prayers are preserved in God's word because they were written down under the inspiration of the Holy Spirit. Are you making that claim for your prayers, that when you pray for Barack Obama to die in office you are doing so because the Holy Spirit is directing you to?
Are believers allowed to express their hurts and injustices to the Father?
Absolutely, in fact we are commanded to do so. But can you show me where in the letter or spirit of Matthew 5:43-48 and 1 Timothy 2:1-3 there is any room for praying for a political opponent to die? Especially for one to die young and leave two daughters without a father? When Jesus says we are not to hate our enemies but to love them, which one does "Die and leave your young daughters fatherless" fall into, hate or love?
Richard Wurmbrand was tortured in prison for 14 years and prayed for Ceaucescu to repent and be blessed. Why is Wurmbrand's God so much bigger than yours?