> Question, how does Switzerland avoid becoming more polarized country with so many referendum questions each year?

As a Swiss, I would say a high number of referenda works against polarization. This Sunday, we had to vote on five national questions and additional local ones. This high number of questions makes it very unlikely that you agree on everything even with your family and best friends. Thus, we automatically learn to disagree without getting polarized.

My grand-father always encouraged his children to vote even though he knew they nomrally had different opinions and "neutralized" his vote. To him, voting at all was much more important than what the vote was, as long as you vote for what you honestly believe is right. I fully share this view.