DNA tests are banned in Israel

Cool! You should convince them Palestinians to convert to Judaism.

"Palestinians" are Jordanian, Egyptian and Saudi Arabian descent- their own proclamation. There is no race of Palestinians. Get a refund from 23 and Me.

What proclamation?
Where did the OP say there was a race of Palestinians? They were Ottoman Turks until after World War I.

Here, allow me to assist you. What the OP said was,

"There's more biblical Israelite DNA in Palestinians than in the modern state of israel."

You can substitute Hebrew or Judean if you want to be technical in order so what confusion with the Kingdom of Israel, having been ended in 720 BC, but other than that, but the OP said is factually correct. And you know it.

Ashkenazi Jews have at most 30% Jewish DNA.
They're not Semites, they're Eastern Europeans, more Slavic than Jewish. But you already knew that also.

And Israel used DNA testing to determine the identity of dead hostages returned from Gaza. They have also used DNA testing to determine descendants of Aaron to determine who can be a priest. Only you can prevent misinformation.

They used the same DNA testing to determine that the Lemba from Zimbabwe were not Jewish. Turned out the Lemba were more Jewish genetically than the Ashkenazis, with a far greater frequency of the Cohen Gene as well. They're not just more Jewish, but more of the priestly class of Jewish.

But Israel won't allow them in. They had a hard enough time allowing themselves to allow Ethiopian Jews in, and the Sephardim and Mizrahi before them as well, for that matter. They too are far more Semitic genetically - and culturally - than the Eastern European Ashkenazi have been for near 2000 years.

But you already knew this also, didn't you?