

Israel exists due to US support for Heganah and similar groups, and global guilt following the public awareness of the Holocaust.
Britain being defeated would probably led to a loss of empire, and with Palestine outside British control the “memo to aid in creation of a Jewish state” would cease, there’d still be Jewish terrorists groups, but it’d go very differently without US power projection and Nazi sphere of influence.
You mean like his and her?
Possessive pronouns don’t use apostrophes.