Amending the constitution to deny some citizens rights is not a priority. You people who complain about homosexuals forming civil unions are the same crowd who complain about homosexual promiscuity and the spread of disease. So, which is it going to be, folks? Gay civil unions and monogamous commitment, or promiscuity and disease?
I'd guess that people like you would choose neither and would prefer that they all "just stop being gay!". I'm afraid that isn't going to happen, so you'd better learn to make the best of the situation.