It’s interesting how you’ve written so much here and not given what concrete example. Makes it very difficult to examine your argument, when you simply state that secular ideology is religious. I think it’s worth noting the definition of secular is: > denoting attitudes, activities, or other things that have no religious or spiritual basis.
It comes down to what you believe is axiomatic about the world.
For example, asserting that life is soulless and meaningless is to take a stand on something that you cannot know. It's a religious position.
All secular beliefs stem from similarly foundationless religious positions.
Or maybe not foundationless, but without acknowledgement of the religious roots (that is, positions that require faith), which is probably worse than acknowledging that the beliefs you hold cannot be proven.
It's worse because it leads people to believe they have a leg up on those religious clods with their backwards ways. When you don't recognize the things you assume about the world require faith, there is no corrective mechanism capable of opening your mind to other possibilities. Secular people and secular beliefs are ironically very close minded.
Take all the things that you believe to be true and work backwards to first principles. What are the assumptions that those principles require to be true?