I agree with MorningStar, but I'd like to add something of my own. A sociological truth, in fact.
Oppression is the dominant group in a society unjustly controlling and/or mistreating a subordinate group. In America, the dominant group is white, specifically white males, but anyone who is white has a privilege that people of other races and ethnicities do not. In America, subordinate groups are, to name a few, women, LGBT+, blacks, and Latinos. The easiest form of oppression to recall is black history in America and their present. Blacks are disproportionately arrested and imprisoned, forming the highest prison population in comparison with any other group. Proportionately, the percentage of black people vs white people in American prisons far outnumbers the actual population in America:
In the 2010 census, 64% of America was white, while 13% was black. In prisons, 39% was white and 40% was black. Today, as of December 26, 2016, looking at only these statistics, things seem to be improving on that front, at least: 37.9% are black and 58.6% are white.
But then, look at what Trump and his supporters are doing to Muslim and Sikh people, many of them Americans. Recently, airports were jammed by hundreds of people of middle eastern descent who had come to America by plane. Because customs corralled these people up and told them, "We know you spent hard earned money to come to the home of the free, where everyone can start a new life in a diverse country where they'll have rights. But you wasted that money. Now go back where you came from."
The ban on immigrants from 17 countries in the middle east is an executive order. That means Trump decided, on his own, to do this, and no one could say no. The only way anyone could stop him is by proving in federal court that this is unconstitutional. And despite
evidence to the contrary, Trump and his PR group still claim that those with green cards--people who have already earned a legal right to stay in the US, and even citizens--are still allowed to travel.
(They rolled it back after protests.)
The Muslim and Sikh community definitely couldn't enact an executive order against, say, Germans entering the United States. Or anything else on that magnitude. Subordinate groups don't have the power. That's why we call them subordinate.
That is why subordinate groups can't oppress dominant groups. Individuals can definitely hate their oppressors, and while that's understandable, it's bias. Prejudice. Members of the dominant group can definitely feel that prejudice, and it doesn't feel good.
But we have to remember, the dominant group is not being oppressed. The subordinate groups are the ones who need protection.