Right now I am trying to track down the accuracy of a quote attributed to Amin Al-Husseini in 1948. It gets brought up in books, opinion pieces, etc. when people discuss Israeli-Palestinian Conflict, but I'm struggling to verify it's accuracy. It made me wonder how Historians would accomplish this and how you might recommend the average person does this? I would appreciate your insight!

(I chose not to include the quote in the main question because it's pretty inflammatory, and I don't want to post it without knowing it's accuracy. If anyone does know a lot about this subject and could help me figure out it's accuracy, I would be happy to respond to a comment about what the quote was. Thank you!)