The multi billionaire said this after Trump announced his plan to deport 3 million immigrants.
The Facebook CEO made it known that his great grandparents where from Germany, Austria and Poland while his wife Priscilla's parents were refugee from China and Vietnam.
The Facebook founder wrote on his page:
“My great grandparents came from Germany, Austria and Poland. Priscilla's parents were refugees from China and Vietnam. The United States is a nation of immigrants, and we should be proud of that.
“Like many of you, I'm concerned about the impact of the recent executive orders signed by President Trump.
“We need to keep this country safe, but we should do that by focusing on people who actually pose a threat"