Even though Christianity and Judaism share the Hebrew Bible in common, they read it completely differently. Christians read it primarily for the stories, particularly the stories that they believe predict the coming of the Messiah. Jews study the Hebrew Bible particularly for the laws.
Seventh-Day Adventism emerged out of the Millerite movement of the 1830s. That was started by the preacher William Miller who said the world was coming to an end.
On what basis did he say this? Daniel 8:14: “Unto two thousand and three hundred days; then shall the sanctuary be cleansed.”
Using the year-day principle, 2300 days becomes 2300 years. 2300 years from 456 BCE means 1844 CE. On Yom Kippur, 1844, Jesus was supposed to come back.
He didn’t come back. Adventists asked themselves why not. They searched the Bible. They found a text in Jeremiah that said that if all Israel kept two Sabbaths, the Messiah would come. The Adventists regarded themselves as the true Israel. They are supercessionists. That’s why they don’t care about modern state of Israel. It has no religious significance to Adventists.