The reason why "all men are created equal" became a core tenant of America is because people far later on in positions of power deliberately decided that it would be that way. It is all in spite of the fact that the man who wrote it, Thomas Jefferson, also wrote extensively of the fact that he found blacks naturally inferior to whites and also literally said in other documents that Americas right to sovereignty comes from the fact we have spilled blood to obtain this soil, documents that have been selectively and deliberately forgotten as part of an active agenda perpetrated by specific people, again, with intent to achieve this specific outcome.
It was not just some "idea" reaching a conclusion. It was people actively working towards a specific conclusion, teaching that you should read "all men are created equal" as "all human beings are exactly the same" and not as a reference to say, the Virginia Charter of 1607 which states those men of English descent born in the colonies would be treated the same as though they were born in England, which is what this is primarily referring to.
So what you have is actually the deliberate degradation, corruption, and twisting of cherry picked aspects of American history to achieve a specific outcome perpetrated by a class of elites and intellectuals who seized power for themselves in the post war era. And in order to correct that, you have to just take power back and then reinstate a more correct reading of history which would suit a better outcome.
Because it just isn't about ideas man. No one cares about ideology and ideas except for a specific class of academics which rarely translates into anything tangible. People care about people, and ideas are represented through people. And so if you control the perceptions they have of men like Thomas Jefferson, like George Washington, like John Adams, men who inherently have magnetism and power to them as a part of our mythos as they are great men, and you alter those perceptions of those men, you then achieve the ideas you want.
Your epistemological framework is completely wrong and quite absurd, because you ignore the origin point, human beings, ones higher within hierarchy in particular, and then somehow think that ideas are living things with agency in and of themselves and not the maleable outgrowth of people. People have agency, to shape ideas, to shape outcomes. Ideas do not.
We can, actually, just as easily instead take the words "For Ourselves and our Posterity" and that can become more powerful in the minds of the public than "all men are created equal" currently is. It just takes a concerted effort by Americans taking the power for themselves with which to do so.
Explain why Americans are supposed to dismiss a core tenant of a foundational document, then. It seems pretty clear to me.
It may be uncomfortable to admit that modern American "liberals" fulfill America's Liberal foundation, but it's the truth of the matter.