[Diego1618]

But he gives a second example about the dispute over the Lord's Day in verses 5 and 6. At the time, the dispute between the Hebrew Christians and Gentile Christians over which day was to be observed as the Lord's Day was still ongoing

I'm afraid you are incorrect. If you read the Greek you will find no reference made to the Sabbath....or "the Lord's day". Not a hint....or implication.

Romans 14:5

Romans 14:6

[magisterium]

Please. Don't patronize. I had to read the text before I responded, didn't I? I know perfectly well that the word "Sabbath" isn't there. Though the implication of the Sabbath certainly is. Context fills in the gap. Just like it does when treating, for example, issues concerning the Trinity, a word not found in Scripture *at all*. If he wasn't talking about the Sabbath, what was the controversy over "this day or that"?