Isn't according to Romans [14v17] that the kingdom of God does Not mean eating and drinking....?
1. Again, context is key. The whole chapter is a lesson to those strong in the faith (Rom. 15:1) not to offend one who is weak in the faith (14:1), especially by eating or drinking anything that would trouble the weak brother's conscience. Such a brother might be a vegetarian or one who abstains from drinking wine (vs. 2, 21).
It could also be a reference to those described in I Corinthians 8:10. There, some were upset by seeing fellow Christians eating in an idols temple, and presumed that what was being eaten had been offered to idols. That chapter similarly warns the "strong" not to cause the "weak" to stumble as a result of the liberty the "strong" enjoy because of knowledge they possess (vs. 1-4, 7, 11). In both cases, the subject has absolutely nothing to do with the distinction between clean and unclean meat as outlined in Lev 11 and Deut 14.
Furthermore, if Rom 14:17 were giving Christians (ambassadors for the coming kingdom of God) a license to eat whatever they want, it would contradict scripture because in Isa 66:13, God threatens to consume those in the kingdom who go after idols,
eat swine flesh, and rats!!!
1st Corinthians [8v8] says food will Not commend us to God.
2. Paul devoted the entire 8th and 10th chapters of 1 Corinthians to instructions on not raising the questions of meats offered to idols.
1Co 10:28 But if anyone says to you, "This was offered to idols," do not eat it for the sake of the one who told you, and for conscience' sake; for "the earth is the Lord's and all its fullness"
Some of the pagan deities were offered bullocks, sheep, goats, chickens, doves, and other clean animals, the remainder of which would be offered for sale in the market. His main subject is not clean and unclean, but being sensitive to a brother's conscience. In other words, if clean meats offered to idols were not polluted, you could eat of them unless it offended someone. Under those circumstances the meat became common, not to you, but to the other person who raised the question about idols. Notice:
1Co 10:29 It might not be a matter of conscience for you, but it is for the other person.) For why should my freedom be limited by what someone else thinks?
Hebrews [13v9] do eatables benefit or profit anyone?
The next few verses tell us the "rules about food" [eatables] that do not benefit or profit anyone have to do with those foods involved with the OT sacrifices (which, btw, were all clean):
Heb 13:10-11 We have an altar from which the priests in the Tabernacle have no right to eat. 11 Under the old system, the high priest brought the blood of animals into the Holy Place as a sacrifice for sin, and the bodies of the animals were burned outside the camp.
3. Paul refers to the ritual observances, the ceremonies, of the Old Covenant, as
"clean" food was involved with them. But over the years, people came to have a superstitious attitude toward such things-that if, for instance, they ate of something that had been offered in sacrifice, it would impart to them some spiritual strength. Eating food with this mentality benefits and profits no one. Again, nothing to do with a license to eat whatever we want.
Colossians [2v16] says to let No man judge you in eating......
Perhaps you missed point 3
here