Hey i've looked for this info everywhere but couldn't find any what I need to know is what type of swords would jews who lived in palestine from Roman times till the crusades etc have used? did they have there own or did they use the same as what the arabs and turks did etc?

I am not aware of any type of sword specific to the jewish population at any period. The sicarii of the Jewish War may have favored a curved dagger, but that is about it. So for swords, the ones in likely use would have been Hellenistic, Roman, Byzantine, and early Islamic ones. Generally, these would be straight, double-edged weapons, either short or of moderate length; although the Byzantines did have the curved parmenion.