Zero evidence if you ignore eyewitness evidence. I guess you think basically nobody should ever be found guilty of rape.
Furthermore, the first witness did not contradict his story. In the TikTok video he describes Hamas murders, and in the later interview he describes the same Hamas murders and goes on to describe the rapes. Those accounts are consistent.
The second witness described Hamas rapes to the AP as well as in his video.
Of course since they are Israeli, they must have served in the IDF. It’s compulsory. So if you don’t believe anyone who served in the IDF that’s equivalent to not believing Jews, a pretty typical attitude for Hamas defenders.