Correct sentence: Starmer stands for everything against what Project 25 stand for and is being brought into law.
One obvious point is the separation of powers of the President/PM from the Judiciary, and for Due Process:
another key one is Starmer's support for Equality and Diversity measures as appropriate, measures against hate crime, and the support for the histories of race and women's equality to be not only in libraries (Trump has been censoring books and articles) but in school curriculum.