The historical record overwhelmingly confirms the core facts of the claim. Wikipedia, citing multiple scholarly sources, states the massacre took place on April 9, 1948, and resulted in the deaths of 101–140 Palestinian Arab villagers. This directly supports the claim's date and the assertion of "over 100" deaths.
Al Jazeera's reporting on the 75th anniversary of the event corroborates the date and notes that "at least 107 Palestinians" were killed. The Institute for Middle East Understanding (IMEU) also describes it as a "massacre of more than 100 Palestinians." While early reports, such as a 1948 British delegation report cited by Al Jazeera, estimated the death toll at around 250, modern scholarship has revised this figure downward to the 100-140 range.
The claim's identification of the perpetrators as "Israelis" is a simplification. The attack was carried out by Zionist paramilitary groups (Irgun and Lehi) before the establishment of the State of Israel on May 14, 1948. However, these groups were the precursors to the Israel Defense Forces, and the event is a foundational part of the 1948 Nakba. The historical consensus is clear that the massacre occurred as described, with a death toll firmly in the "over 100" range.
The evidence is strong, drawing from multiple reputable sources including Wikipedia (which cites extensive scholarly research), Al Jazeera, and the Institute for Middle East Understanding. All sources agree on the core facts: the date (April 9, 1948), the location (Deir Yassin), the perpetrators (Irgun and Lehi militias), and a death toll in the range of 100-140. The historical consensus is well-established and not seriously disputed by mainstream historians.