You're half right, there is no such thing as reverse sexism/racism. Because racist is racist, no matter the race. And sexist is sexist no matter the gender. They are not reversed because it comes from a non-white or a female. It's just racism/sexism. Period.
Sexism
https://www.merriam-webster.com/dictionary/sexism
1 :prejudice or discrimination based on sex; especially
:discrimination against women
2
:behavior, conditions, or attitudes that foster stereotypes of social roles based on sex
Sexism | Define Sexism at Dictionary.com
1. attitudes or behavior based on traditional stereotypes of gender roles.
2. discrimination or devaluation based on a person's sex or gender, as in restricted job opportunities, especially such discrimination directed against women.
3.
ingrained and institutionalized prejudice against or hatred of women;
https://en.oxforddictionaries.com/definition/sexism
Prejudice, stereotyping, or discrimination, typically against women, on the basis of sex.
Notice a lack of exclusivity of this being only against women. The feminist origins of the word were aimed at women, during times when such behavior was more common and accepted against women. But modern definitions do include males as well, as women have taken over many positions once held exclusively by males. So it seems that women can be equally biased against men once they gain positions of power. And in this day and age the word can also be used for transgender and others of similar gender limbo.
But at no point does any definition state anything about economic class or financial status.
Racism
https://www.merriam-webster.com/dictionary/racism
1 :a belief that race is the primary determinant of human traits and capacities and that racial differences produce an inherent superiority of a particular race
2 a
:a doctrine or political program based on the assumption of racism and designed to execute its principles
b
:a political or social system founded on racism
3
:racial prejudice or discrimination
Racism | Define Racism at Dictionary.com
1.
a belief or doctrine that inherent differences among the various human racial groups determine cultural or individual achievement, usually involving the idea that one's own race is superior and has the right to dominate others or that a particular racial group is inferior to the others.
2. a policy, system of government, etc., based upon or fostering such a doctrine; discrimination.
3. hatred or intolerance of another race or other races.
https://en.oxforddictionaries.com/definition/racism
1 Prejudice, discrimination, or antagonism directed against someone of a different race based on the belief that one's own race is superior.
1.1 The belief that all members of each race possess characteristics, abilities, or qualities specific to that race, especially so as to distinguish it as inferior or superior to another race or races.
Let us take note, once again, the lack of economics or power in this definition.
In both words it is a prejudice against a race/gender, regardless of any other status. To suggest that a white person that hates blacks is racist, yet a black person that hates white people is not defies all common sense and logic. This is wordly thinking.
I am not rich, far from it. I hold no economic power, no status of any relevance. I am a poor, powerless white man. But if i were to hate blacks (which i don't) i would be a racist because only races with economic power can be racist? Your concept falls apart when applied to the real world, and not some secularist fantasy that all white males are rich and powerful racists seeking to keep the lowly 'others' down.
I'm not sure currently, but for many years one of the richest and most powerful people in the US was a black woman.
And with the way current sexism and racism against white males is going, and the increase in non-whites and women in positions of power and wealth growing white males may just well not be the economic holders. Once white men are 'dethroned', will the growing trend of hating non-whites and males then become sexism and racism in your eyes?
The ridiculousness, implausibility and misunderstanding of the words used in your theory are easy to see... when not looking through a secularized lens colored by popular culture that increasingly and actively goes against Gods word.
So only whites have taken land that didn't belong to them? Interesting theory. Total horse crap, though.
And who was it selling Africans? Oh. Right. Other Africans. They were selling their own people. But i suppose mixing truth within your accusation kind of deflates it.
And who was it that enslaved the Jews for so long? Hmm.. Egyptians? Africans? Oh, another darn truth that gets in the way. Some of the oldest, and most well known slave keepers were African. Even more odd the ancient Egyptians are most well known for their vicious slave practices? Oops, no. Those Africans got a free pass on their slave ownership because people ignore it in favor of the mystery of their culture and oddness of their pagan gods. Not to mention they ignore all the years of Africans owning another race as slaves 1000s of years ago when whites didn't seem to even exist, and instead focusing on that blacks were slaves. And ignore the aforementioned fact that they sold their own to be slaves.
Darn it all. Seems history speaks against your case.