That is a lie. Almost all Israelis are IDF. It is required by law, even more so back then.
And it is an obvious lie to claim they were a medical convoy.
There was no need for a medical convoy to go into Palestine, where there was no fighting, since it was under Jordanian supervision.
All the fighting, injuries, deaths, etc., were near the border, not in Jerusalem.
The fighting in Jerusalem had long been over.
Why would anyone send a heavily armed medical convoy into what was essentially enemy territory?
If you really wanted to just achieve medical purposes, you would have been unarmed and ask permission.
You would not murder the border guards and blow up the barricades, like they did.
All the convoy vehicles were armored and heavily armed.
Look at the pictures.
There are no red cross or any medical symbols.
These were all armored and heavily armed weapons of war, attempting to attack Jerusalem.
A medical convoy could have been given permission and escorted.
But this was an attempt at a covert attack.
Nor was any medical assistance needed in Jerusalem.
It was not a combat zone and had all the medical facilities of the British and Jordanians.