So, you've got nothing then? You see no good reason for one citizen to be treated differently than another? You have no good justification, and you are good with it?
What happens when the citizen held to a higher level of protection is one with which you disagree? Will you be able to agree that Christians have an equal right to voice their opinions as non-Christians, for example?
A protected class is not held to a huge level of protection. They are protected to ensure they are held to the same standard as everyone else as a way to compensate for people like you who would discriminate against them