The act of adultery (or murder, or theft, or +7) is not what denies salvation. It merely reveals your lack of love for the One you claim to love. God says, "Those that honor Me, I will honor." Do you know where that quote is found in the Bible? Go look it up sometime. It's very enlightening.
Saying that Jesus quoted from the 10 commandments and trying to apply that to keeping the Saturday sabbath is a very weak argument, especially since neither Jesus nor any of His apostles ever mentioned anything about keeping the Sabbath. They mention every single other commandment except for the Sabbath.
1 Corinthians 6:9-11 Don’t you realize that those who do wrong will not inherit the Kingdom of God? [Note that here Paul equates doing wrong with loss of salvation.]Don’t fool yourselves. Those who indulge in sexual sin, or who worship idols, or commit adultery, [Look at that! One of the Ten Commandments! And if Paul mentions one, of necessity he includes all ten.] or are male prostitutes, or practice homosexuality, or are thieves, or greedy people, or drunkards, or are abusive, or cheat people—none of these will inherit the Kingdom of God. Some of you were once like that. But you were cleansed; you were made holy; you were made right with God by calling on the name of the Lord Jesus Christ and by the Spirit of our God.
If Paul was including all 10 commandments in that statement then he wouldn’t have specifically told the Colossians that they are not to be judged for not observing the sabbath days.
“Therefore no one is to act as your judge in regard to food or drink or in respect to a festival or a new moon or a Sabbath day”
Colossians 2:16 NASB1995
I’ve noticed that every time Adventist’s quote Jesus or the apostles preaching to keep one of the 10 commandments they always say that this applies to ALL of the commandments BUT when Paul says we are not to be judged for not observing the sabbath days now all the sudden this doesn’t apply to ALL sabbath days. So they’re not being consistent in their argument. Paul emphasizes on this again in Romans 14.
“Who are you to judge the servant of another? To his own master he stands or falls; and he will stand, for the Lord is able to make him stand. One person regards one day above another, another regards every day alike. Each person must be fully convinced in his own mind. He who observes the day, observes it for the Lord, and he who eats, does so for the Lord, for he gives thanks to God; and he who eats not, for the Lord he does not eat, and gives thanks to God. But you, why do you judge your brother? Or you again, why do you regard your brother with contempt? For we will all stand before the judgment seat of God. For it is written, “As I live, says the Lord, every knee shall bow to Me, And every tongue shall give praise to God.” So then each one of us will give an account of himself to God. Therefore let us not judge one another anymore, but rather determine this—not to put an obstacle or a stumbling block in a brother’s way. I know and am convinced in the Lord Jesus that nothing is unclean in itself; but to him who thinks anything to be unclean, to him it is unclean. For if because of food your brother is hurt, you are no longer walking according to love. Do not destroy with your food him for whom Christ died. Therefore do not let what is for you a good thing be spoken of as evil; for the kingdom of God is not eating and drinking, but righteousness and peace and joy in the Holy Spirit. For he who in this way serves Christ is acceptable to God and approved by men.”
Romans 14:4-6, 10-18 NASB1995
Here we see that honoring God on a specific day is not necessary as long as the person observes that day for The Lord.
Furthermore since we’re on the subject Paul also makes it clear that observing the dietary laws is also no longer necessary in both of these passages. Even Jesus Himself said in Matthew 15 that it’s not what goes into the mouth that defiles us but what comes out.
As for your quote from 1 Samuel 2:30 the reason many Christians worship on Sunday is to honor God, that’s precisely why they go to church on Sunday. It’s not as if they go to church on Sunday to defy Him, they could do that by not going at all. It would make ABSOLUTELY NO SENSE for someone who wants to defy God to go to church at all. So by this you can see the scriptural evidence explaining why some people choose to worship on Sunday rather than Saturday. The whole point of worshiping on Sunday is in honor of Jesus’ resurrection, not out of defiance, that wouldn’t make any sense at all.