If you walk around with hatred and prejudice in your heart and mind all day, morally you’re just as much a killer as the one who pulls out the gun. That seems to be what Jesus is saying. The evil and genocide of World War II was the final result of decades of negative and paranoid thinking among good German Christians, Catholic and Lutheran. The tragic fascism of Nazi Germany was fomenting in people’s hearts long before a political leader came to catalyze their hate and resentment. Now it seems we are seeing the same in the United States.
Jesus tells us to not harbor hateful anger or call people names even in our hearts like “fool” or “worthless person” (Matthew 5:22). If we’re walking around all day thinking, “What an idiot he is,” we are already in the state of sin. Sin is more a state of separation and superiority than any concrete action—which is only the symptom. How we live in our hearts is our real truth.
.. Jesus insists that we love our enemies and pray for those who persecute us (Matthew 5:44). For Jesus, prayer seems to be a matter of waiting in love, returning to love, trusting that love is the unceasing stream of reality. Prayer isn’t primarily words; it’s an attitude, a stance, a state that precedes “saying” any individual prayers. That’s why Paul could say, “Pray unceasingly” (1 Thessalonians 5:17). If we think of prayer as requiring words, it is surely impossible to pray always.
The Souls of Poor Folk identifies the United States’ irrational attachment to war:
The massive U.S. defense budget has never actually been about “defense.” . . . Rather, their goals are to consolidate U.S. corporations’ control over oil, gas, other resources and pipelines; to supply the Pentagon with military bases and strategic territory to wage more wars; to maintain military dominance over any challenger(s); and to continue to provide justification for Washington’s multi-billion-dollar military industry. 
The Souls of Poor Folk: Auditing America 50 Years After the Poor People’s Campaign Challenged Racism, Poverty, the War Economy/Militarism and Our National Morality, https://www.
poorpeoplescampaign.org/audit/ , 11. See the report for detailed and well-researched data.
Economic justice is not popular. Who will hold our politicians and corporations accountable today? Jim Wallis, founder of the faith-based nonprofit Sojourners, writes:
What if the calls for economic justice were made in the name of Jesus—or Amos, Isaiah, Jeremiah, and Micah—instead of from more ideological sources and causes? . . . What if behavior in the economic spheres of our lives became the substance of adult Sunday school curriculums and Bible study groups? And what if the hard political questions about corporate responsibility, tax benefits, trade policies, budget priorities, and campaign financing were coming from religious congregations that political leaders couldn’t afford to ignore? Nothing could do more to bring about a change of fortunes in the battles of class warfare. 
There has been a permanent state of class warfare of the rich against the poor throughout history, but for some strange reason it is only called class warfare when it is the poor against the rich!
Large companies, churches, and governments get away with and are even applauded for killing (war), greed, vanity, pride, and ambition. The capital sins are rewarded at the corporate level but shamed at the individual level. This is our conflicted Christian morality!
Instead of legitimating the status quo, liberation theology tries to read history and the Bible not from the side of the powerful, but from the side of the pain. Its beginning point is not sin management, but “Where is the suffering?”
The world tends to define poverty and riches simply in terms of economics. But poverty has many faces—weakness, dependence, and many forms of humiliation. Essentially, poverty is a lack of means to accomplish what one desires or needs, be it lack of money, relationships, influence, power, intellectual ability, physical strength, freedom, or dignity.