The cultural implications
1) Is the Biblical admonition against homosexuality a cultural thing?
No -- it is all through the Bible declared as "an abomination to the Lord".
Leviticus 18 is pretty straight forward against incest and homosexual behavior.
It's a call to LEAVE the culture of surrounding countries and not do these abominations.
Lev. 20 has a list of sins that result in the death penalty, adultery and homosexual behavior among them.
"The wages of sin" is still "death", though Christ suffered that penalty for all sinners, including homosexual sin, and forgiveness and restoration is offered to all who come to Christ for forgiveness and cleansing, yet this clearly shows it is SIN, not a "cultural restriction".
Paul's reference has nothing to do with "policies of the church" but who will and who will not enter heaven!
1 Cor. 6:9 Know ye not that the unrighteous shall not inherit the kingdom of God? Be not deceived: neither fornicators, nor idolaters, nor adulterers, nor effeminate, nor abusers of themselves with mankind,
6:10 Nor thieves, nor covetous, nor drunkards, nor revilers, nor extortioners, shall inherit the kingdom of God.
2) Is ordaining or not ordaining women a cultural thing?
First I find nothing in scripture saying "to ordain a woman is an abomination to the Lord".
Secondly, what Paul does write concerning women in church has long ago been relegated to the "cultural bin" by even the most ardent "no ordination for women" people!!
Are women silent in church? -- Paul says he does not allow women to speak in church.
1 Cor. 14:35 And if they will learn any thing, let them ask their husbands at home: for it is a shame for women to speak in the church.
1 Timothy 2:11 Let the woman learn in silence with all subjection.
2:12 But I suffer not a woman to teach, nor to usurp authority over the man, but to be in silence.
If people really take Paul seriously we would never have any woman be an Adult Sabbath School teacher, a Sabbath School Superintendent, or any other office which requires teaching or speaking or having authority over a man.
Now, it is plain that Paul is speaking of CHURCH POLICIES, for he writes
“...I am writing you these instructions so that ... you will know how people ought to conduct themselves in God's household, which is the church of the living God...” (1 Timothy 3:14-15)
Yes, most all Christians, including Adventists treat these verses as "cultural" and no longer applicable to our day. Possible some Mennonites still follow it as their women wear little scarfs or hats (another of Paul's commands) and don't allow women up front.
Conclusion:
So Point One is not cultural, it is repeatedly listed in the Bible as SIN.
Point Two is dealing with church policy.
So there is a difference!
Again, my concern is equating women with homosexuals.
To do so means people have accepted the worldly claims that homosexuality is not a sin, just an orientation.
And if that is the case, really, resisting the ordination of women won't stop homosexual's from being ordained -- after all they are still physically men, and when its to their advantage they will claim to be men.
The issue with ordaining homosexual's isn't a gender issue at all, it is whether the church sees homosexual activity as sin or not.
When we as a church get confused as what is sin and what is church policies it seems we need to take a second look.