To clear this up, because open Holocaust denial is never OK:

Thousands of jews were indeed murdered at Babi Yar, you can find their names online [0]. Paul Blobel [1] was executed at Nuremberg for this. No serious source disputes the killing of jews at Babi Yar, be it the US, Germany (where this matter went to court), Israel, Ukraine, or Russia.

0: https://yvng.yadvashem.org/index.html?language=en&s_id=&s_la... 1: https://en.wikipedia.org/wiki/Paul_Blobel