@BuanoKubiamVej
(i) you will never convince another person to change their mind on this subject via rational argument. Minds can certainly be changed but it's a gradual process not something that happens via persuasion.
Very true on a human level but, in the context of becoming a Christian, it is the Holy Spirit who will conduct that work of conviction & renewal in the life of someone who comes to Christ, if we let Him. It is only with His help that any of us can become what we were designed to be & leave behind the things which formerly bound us in darkness.
(ii) the bible says virtually nothing about the concept of being gay as we understand it in our modern culture. The New Testament was written 2000ish years ago and the Old Testament 3-4000 years ago and culture was very different then. There was a general acceptance in numerous cultures that wealthy and powerful men would have a wife for bearing children and a variety of boys, eunuchs and concubines for pleasure. The passages that are chosen to condemn homosexuality could equally be read as condemnation of what was in the contemporary context generally exploitative and non-consensual sexual activity, not remotely similar to a committed relationship between two consenting gay individuals.
Yes, some make that case, and, in fairness, often out of a genuine & understandable wish to show love & respect to our gay friends. Unwittingly, however, this approach may only provide them with a reason to ignore the very clear message of Romans 1 vs 18 - 32, which shines a light on one likely reason for the apparent explosion of homosexuality across many world societies, including our own. (i.e. that God has effectively "given over" the disobedient to their desires.)
(iii) the bible says absolutely nothing whatsoever about lesbianism. If being gay and acting on it were a sin, it would be so for men and women equally so the lack of mention of anything to do with women in this context can only mean that it is talking about something else entirely.
Can I humbly refer you again to Romans 1 v 26 -27 - "Because of this, God gave them over to shameful lusts. Even their women exchanged natural sexual relations for unnatural ones. In the same way the men also abandoned natural relations with women and were inflamed with lust for one another. Men committed shameful acts with other men, and received in themselves the due penalty for their error."
In this passage, female SS sexual relations are referred to here in the same breath as male SS acts, which are similarly denounced.
(iv) St Paul is clear that the ideal as far as he is concerned would be for everyone to be celebate, but he acknowledges that most people can't live like that so agrees that this without the capacity for celebacy should get married. That seems to me to be equally applicable to gay people.
Well it would be applicable if God's creation plan for human relationships in Genesis and throughout the rest of the bible included affirmation of same sex sexual relationships and marriage. Unfortunately, however, it doesn't, and so any pronouncement well-meaning Christians may make now which proposes that same sex relationships are entirely equivalent and equally valid in God's thinking is to dangerously overstep our authority, in my view.
The bible tells us that God-given marriage is a picture of the loving and sacrificial relationship between Jesus Christ and His Church. In His wisdom and sovereign position of authority as creator & Heavenly Father of all, He chose to provide a woman to be the perfect life-long partner for a man in His version of marriage - and, for a husband's love and care of their wife to be the perfect representation of Christ's love for the church. All of these relationships are "heterogeneous" in character - not homogeneous - They are composed of different, not similar components - God & humankind; Husband & wife. This, put simply, is why a SS relationship, whether loving, monogamous, permanent or not, cannot, with apologies to all who feel or live or experience things differently, completely fulfil God's brief of being a perfect model of Christ's love for His Church.
Given that "society" has recently chosen to institute its own laws & freedoms concerning same sex marriage, many Christians may wish that God, too, was now supportive of SS relationships and sexuality. However, we can't force Him to adopt that position against His own nature, creation plan and word. If people seriously want to do business with God, it's got to be on His terms, not ours, irrespective of whether that fits in with our own humanistic notions of right & wrong - and of God's character - in the 21st century.