why gay marriage should be legalized

I think gay marriage should be legal because its unfair that heterosexual marriages are legal in every state in America but gay marriage is only in 17 states is gay marriage legal. The same thing happened in the 1960s with the civil rights movement. And like Martin Luther King Jr said, I have a dream that one day this nation will rise up and live out the true meaning of its creed: "We hold these truths to be self-evident, that all men are created equal." As my sister is homosexual, I am ready to see change in America as it is said in the constitution all men are created equal. And so white house I would like to have gay marriage everywhere in America