"buy land in a country and then arm themselves to kill everyone" - Jews did not come to Palestine in the 1800s armed. Usually, Islamic law forbids non-Muslims from having weapons. Palestinians attacked Jews first, in the 1800s, because they did not like non-Muslims asserting equal rights. https://medium.com/non-violence/palestinians-started-the-attacks-only-palestinians-can-stop-the-escalating-violence-4181a1528c0b