I find it amusing that people are trying to ascribe some set of universal traits held by all religions. It's virtually impossible beyond the most basic: Religion is a social institution that seeks to create communities based upon shared belief systems.
That's it. Religion, at the end of the day, is a tool, and like any tool, it can be used for progressive or regressive ends. Yes, religious leaders throughout history have used their religions to justify oppression and violence. So to have governmental leaders used governments -- does this mean that government is inherently bad or regressive? Of course it does not -- because we recognize that governments are tools, and that when patriotism is used to justify oppression or aggression, this reflects a flaw with the leaders and the evils for which the tool is being used, not because these traits are intrinsic to the tool itself. Patriotism was used as a rationalization for the Iraq War; that doesn't mean it is inherently bad, nor that it was the real reason for the war. Religion can be used as a rationalization for aggression or oppression -- but that doesn't mean religion is inherently bad, or that religion is the real reason for those acts.
Prime examples: The Crusades were not about religion, they were about Europe wanting the seize the wealth and power of the Islamic world. The oppression of women and LGBT person is not about religion, it's about propping up capitalist patriarchy. The Troubles in Northern Ireland were not about Protestantism vs. Catholicism, they were about the meaning of what it is to be part of the Irish nation and about Irish self-determination. The conflict between Israelis and Palestinians is not about religion, it's about two different cultures with competing claims to the same narrow slice of land as their national homeland. The conquest, oppression, and genocide of the Native American nations was not about religion, it was about stealing Native land for Europeans and exploiting their wealth and labor. Etc.
The proof is in the pudding: If religion were the origin of oppression and violence, a regime that rejects religion would not be so. Yet the Soviet Union, an atheistic regime, was as murderous as any religious regime in history has been. And yet we are enlightened enough that we don't take this to mean that atheism is inherently murderous and oppressive!
Religion has been used to rationalize oppression and violence whose real causes lied in economic systems and political agendas; this is true. It is also true that religious persons throughout history have been motivated by their religion to act in the interests of justice, peace, and equality, and that religion has provided the emotional sustenance for important social movements. The Civil Rights Movement of the 1950s and 1960s was, let us recall, driven by religious leaders such as the Rev. Dr. Martin Luther King, Jr. Opposition to mass-murdering capitalist regimes in South America came from the practitioners of Liberation Theology. Religious leaders like Archbishop Desmond Tutu were invaluable in the struggle against apartheid in South Africa. Today, the Moral Monday movement, led by the Rev. William Barber, has proven one of the largest and most important social movements to advance social justice and equality against the repressive and racist North Carolina government.
Religion, at the end of the day, is just a tool. It can be used for progress, or it can be used for regression. It is not inherently anything except an attempt by a community to find meaning in their shared beliefs. The question is whether their beliefs promote equality, liberty, and justice, or promote hierarchy, oppression, and violence.