Others are not obliged to participate in your delusions.
Let us parse out this statement:
1. We know the North had no concern for the slaves...... a) Who is we? b) Define the North. c)Please clarify, no concern for the slaves.
2. ........because the Northern Congress.... Say what? It was a Joint Resolution passed by both houses of Congress.
3. .......and with Lincolns urging,.... Surely you meant to say Buchanan.
4. ......passed the Corwin Amendment. Of course no such thing ever happened. An Amendment requires ratification by the States. And certain States had already seceded by the time President Lincoln mentioned the Corwin Amendment in his First Inaugural Address.
5. ....which would make the Union into a nation that passed a constitutional amendment to preserve slavery. When you say Union, do you mean the entire nation? Or, do you intend to imply the North would end up being a separate nation that passed a constitutional amendment to preserve slavery? Of course, you and I both know that the proposed amendment did not have as its intent to preserve slavery for the whole United States. The proposed amendment put the issue of slavery up to each individual State. You know, like States Rights and such. I do recall the time when you made the comment on a CW thread that President Lincoln had declared that he had no objection to Slavery being made express and irrevocable. Remember that? Good times.