Assalamu alaykum wa rahmatullahi wa barakatuh
This article and many news covering it are not correct.
Tantawi made a clarification recently.
What happened was that Tantawi entered a girls school, in a girl's only class. There was a girl who wore niqab in that class, even when no men were present. So the Shaykh was not happy at such extremism.
The Shaykh himself is an old man, so, its not like he wanted to see this girl, or something. He wanted things to be "easier" for her.
From this story it all snowballed into something else.
wallahu a'lam
assalamu alaykum wa rahmatullahi wa barakatuh