(Found) Mission to stop Christianity

[TomMazanec]

Short story.
Main character is woman sent back to early 1st Century to kill Jesus Christ, because Christianity's Human Domination of nature meme led to ecological collapse. She succeeds, but when she gets back to the "present" the mission control says "Just like a woman, you did nothing to stop the rise of Mirhraism!".

 

[M. Robert Gibson]

Our friends at UNZ suggest it might be Time To Kill by Elinor Busby

A search for Mithraism throws up this result

p. 91 ... do a thing to stop Mithraism." ---ELINOR BUSBY

but I can't find a synopsis

 

[M. Robert Gibson]

Found it on Internet Archive: Digital Library of Free & Borrowable Books, Movies, Music & Wayback Machine

I won't link to the full article - copyright and all that - but a search for Full text of "Amazing Stories v51n01 (1977 10)" should do the trick

Here's the final paragraph:

“You blew it,” said Lyle. “Your
Female Principle is as suppressed as
ever. You didn’t do a thing to stop
Mithraism.”

 

[TomMazanec]

And that’s it! Found.
Thanks.