Cako... please don't use the line, "Did you even read the verse/post/question/whatever that I put up?" when in a discussion. At best it's condescending, at worst it means you actually didn't understand the person and want to either overpower them or put them down.
You do not know who will be in the Kingdom of Heaven. "By your fruits you shall know them" is meant to establish pure fellowship, but you do not know men's hearts or where they will reside in eternity. You do not know what good work God may be doing through Jesus Christ. You do not know what is going on between any man and God. You do not know whom the Lord is working out salvation in.
You quoted three verses without the context of the chapter to prove your point. Don't jump around because a verse seems to hit your topic. A chapter of the Bible can offer a year's worth of study and sermons. So yes, I read your verses, but I challenge that you understand the full context of what you cited in Romans. Those that give approval would be among the same reprobate mind who practice them! If a Christian was worthy of death for encouraging sin, then God would smite half the Christian population (or more) for every single human, sinful error that caused someome to stumble. Focus on WHO the chapter is speaking of... again, it is those who are given over to the reprobate mind.
This mind... is also not for you to know. You may assume, you may judge falsely, but again... only the Lord knows a man's mind. You cannot discern what the Holy Spirit is doing in a man's heart or what measures or places or depths they may be taken to in the process of that work.
That is why you are not to condemn or judge, for you bring condemnation of the same unto yourself. A warning that someone will go to hell in their sin without Christ is one thing, but warning that they will go to Hell for their sin... makes you out to be God, for you do not know the mind of God, which you would need to know if you say you know a man's mind.