"Imposing measures intended to prevent births within the group" "with intent to destroy, in whole or in part, a national, ethnical, racial or religious group" is part of the definition of genocide. The Convention on the Prevention and Punishment of the Crime of Genocide was adopted in 1951, so it is strange to claim this idea comes from modern leftists.

https://www.ohchr.org/en/instruments-mechanisms/instruments/...

You can look over the commission's report here:

https://www.ohchr.org/sites/default/files/documents/hrbodies...

The commission mentions the attack only briefly, does not seem to rely on the notion that embryos have rights, and finds that the IDF deliberately targeted the clinic. This event is irrelevant to discussion of abortion in the USA and the commission did not say what you claim it said.

so no.