The problem is that you keep saying that TE/EC is “creationism”, and it isn’t – as that term has normally been used in the discourse of the past 100 years in the USA. Nor does the NCSE call any of its Christian members “creationists.” If it did, it would alienate them and they would leave. Eugenie Scott was far too smart politically to do that. She knew that without substantial Christian participation (i.e., TE/EC participation), the NCSE would be seen as a political front for atheism and materialism. So she cultivated good relationships with TE/ECs.
I have no more time to spend on this. Read about Scott and Miller. You will see that I am correct.