Agreeing on definitions is the starting point for agreeing on anything else. To my mind, ideologies are secular religions. What's missing from that quoted definition is "based on secular beliefs." So theology would be the same thing [but emphasizing the individual], based on sacral beliefs.

I do think we must move beyond ideology. The Middle Ages were dominated by theology. With 'the Enlightenment', 'reason' was supposed to deliver humanity from the arbitrariness of beliefs, but only created ideologies.

The ideology of Liberalism, based on believing in equality and liberty as the 'twin pillars' of justice, did represent an advance in our understanding of justice. Now we must recognize that the ethic of justice is mutual respect.

A requirement of mutual respect follows from a belief in equality, but it also follows from the material observation that human beings have no choice but to effect choices (i.e., choose among perceived alternatives and take actions to bring that choice to fruition). That observation applies to individuals and to formally organized groups, such as nations, so the ethic also applies to both.