There are plenty of anti-Zionist Jews, despite Zionist attempts to equivalate Judaism, Jewishness, and Zionism. Israel’s use of the Star of David on its flag does a disservice to non-Zionists of faith.
Edit: Also, there are many secular Jewish Zionists, making the Star of David on the flag all the more obfuscatory. Unfortunately it’s a symbol used by 1) an ethnicity 2) a culture 3) a religion and 4) a nation-state.