I think that the use of the word "created" is as important in this discussion as the concept of "equality". If "creation" is removed from the realm of "a deity", the concept of "equality" becomes a "political creation". It is this distinction which provides the subtext for the separation of those who promote the role of religion from those who would not.
If your interest were in the religious implications of the statement, i think you ought to have made that more clear at the beginning. The Declaration of Independence was largely the work of Thomas Jefferson, but despite the protestations of those who fawn over him, it was not exclusively his work. He borrowed heavily, of course, and his final product was heavily redacted by a committee of the Second Continental Congress.
Many, and perhaps most of those men were deists. I can think of no other term which could reasonably be applied to Jefferson himself. I suspect that the theological implications of the phrase were not uppermost in the minds of the authors. The members of the Second Continental Congress, and of the constitutional convention which sat a little more than a decade later were very much aware of the divisive and destructive effect of sectarian strife, especially as it was played out in the English civil wars of the 17th century. This is made more apparent in their private correspondence and their public remarks on religion. The constitution was only ratified because of a promise to provide a bill of rights, and, faithful to that promise, the First Congress made that their first order of business. The two opening clauses of the first amendment to the constitution make clear that the framers and the members of the First Congress intended, insofar as they were able, to prevent sectarian strife, and to remove the taint of sectarian prejudice from their polity.
So, i doubt that this phrase was intended to be a theological statement, but rather a political statement. It is difficult to see it any other way in the context of the entire document, which is a political statement written to justify the most extreme of political measures--secession of one portion of a polity from the rest of the polity.
That was the basis upon which i made the remark that this is a political statement to the effect that all men are equal politically.