Folau’s response was poorly phrased, but probably what he though was accurate, based on the question and his understanding… from what you posted, he was not asked his own opinion, nor did he give it. However the question was vague and likely meant as a trap. (Like, for example, when Jesus was asked about taxes… “It’s a trap!”)
It is generally better to point back to what God says on a subject, than answer in a way that can be interpreted as one’s own opinion or judgement. (Not saying I’ve never messed that up, though.)
@Ook was correct, it is not our place to judge. But that’s incomplete. It is God’s place to judge.
If you trace it through the Bible, all humans have a sin-nature, inherited from Adam & Eve. So, by default, all humans are sinners. The penalty for sin is death… for everyone. God is the judge.
- you believe that Jesus lived a perfect, sinless life on earth as God’s Son, and
- you believe that He died to pay the penalty for our sins, and
- you accept** Jesus’ gift of salvation made possible by Him paying our penalty
** accept by professing faith in Him as your Lord and Savior…
Then, God forgives you of your sins and accepts you into His family.
If, on the other hand, you do not believe, accept, and profess, then at the end times, you will be judged by Jesus and condemned for your sins. (Revelation is not an easy read, but an interesting study.)
So, really, the tweeted question was loaded because it specified gay people. Yes, there are acts that God calls detestable, but that does not mean that one sin is greater than another. Murder is a sin; the penalty is death. Stealing is a sin; the penalty is death. Coveting is a sin; the penalty is death. Lying is a sin; the penalty, in the end, is eternal death, in the lake of fire… just like for every other sin.
@Ook referenced Romans, and there is a lot of good teaching in there, and a lot of what Paul teaches is a repeat of what Jesus taught: love one another, even your enemy; pray for your enemy; do good toward your enemy; build each other up instead of tearing each other down; don’t judge because that’s not our place; don’t worry about God’s judgement of others, but worry about cleaning up our own house. (Not saying ‘be uncaring’ - not supposed to be happy that someone else will be judged for their wrongdoings. But rather, pray for them, give gentle correction, gentle correction in private rather than publicly for all to see, share the Truth that God loves them and wants the best for them. Etc.) Again, in no way do I resemble perfect; I have many failings and shortcomings. But I get daily reminders of where I need to improve and strive to be better.
If you think about it, all the people who turned around and publicly chastised Folau are practicing the very act for which they’re condemning him. Hmmm.