At 10:34 below I addressed the Constitution Star raised below. But now I will address her references to slavery.
She says rightly that slavery was an intolerable evil that should not be voted on.
Slavery denies a person their unalienable right to liberty and to the fruit of their labor. It is an extreme evil and with the passage of the 13th Amendment unconstitutional. it is important to remember the Gov did not grant the slaves the right to be free it just stopped denying them a right they already had.
People voting to stop denying their fellow citizens the right to marry the consenting adult they choose in no way denies another their rights. So voting to allow same sex couples to marry is about as far from slavery as you can get.