I suggest the liberals are not at all being silent, Ake. THey are standing up for equal civil rights, which is the central issue here. ALl your arguments in favor of discrimination on account of this rationalization or that justification do not add up to a sensible answer to the question of whether civil rights should be equitable, or discriminatory.

There are OTHER issues connected with homosexuality which have been frequently thrown into this thread and the earlier one on Prop 8. None of them change the core equation--equal protection under the law, equal rights under the law, is the only basis for a sane democracy.
If those rights are correctly established and defended then the rest of the questions can be confronted in their proper domains, such as the medical domain, or even the criminal domain in some details.

As for the traditional status of the institution of marriage, let me remind you that according to similar traditions, fifty years ago it would have been illegal for a person of Obama's hue to marry a white lady despite consent and intent on the part of both.

This is exactly the pattern of prejudice you are defending, asserting that a certain class is pre-judged to be not amenable to social function, without any evidence of individual offense or failure. THis is prejudgement in its most classic form.