I fail to see how that gives rise to a right to have the State recognise as “marriage” the sexual union of 2 men.
This is a matter of law in the US, and is correctable by the law in the US. It is not an argument for marriage to apply to all pairs who wish to claim it. Unless you are arguing for the ends justifying the means.
Yes, and they opposed it. Your Church opposes it.
Well, as a Church, I don’t think their opposition rested on concerns about the tax code.
I assume you say that with tongue firmly in cheek. If the Church was fine with SSM being legalised, do you think they’d have written a letter with the following in the first paragraph:
"We…express our deep concern over recent actions on the part of our respective governments and certain societal trends concerning the status of marriage in our countries, in particular the legalization of same-sex unions."
Your Church opposes legalisation of SSM and it expresses its rationale for that on the foundation of the Church’s teaching.
Your assertion that States “must” admit same sex couples to marriage - because not to do so is wrong - is in direct opposition to your Church which advocates the reverse.
Elsewhere, you’ve said that essentially anyone should be able to marry, eg. a pair of “elderly sisters”. No doubt, your Church would disagree on that too. The problem IMHO is that you see the “marriage” as the legal framework provided, but devoid of meaning beyond that. Now, in so far as the legal framework is concerned, I have no issue with arbitrary persons being able to access fair and appropriate legal frameworks that benefit them and the society. If two sisters intend to form a single household, share assets, mutually care for each other, etc. etc., then I - like you - would say, that’s fine, and if the State sees equity in extending all kinds of tax breaks and legal framework to such an arrangement, then great. I simply say - that is not marriage! It may be legally convenient to pretend it is (because some elements of legal framework proposed might be the same as in marriage), but it is absurd. As absurd as two men seeking marriage.
By the way - are you a lawyer by any chance? I only ask because I came across another poster (who is a lawyer) who had a similar approach to yours in trying to distinguish what is “legally right” from what is “right”.