Why Brexit? Why leave the single market?

These reasons for leaving... are just so invalid. My dad is voting Brexit party and I think we're better off being more open and adopting a shared identity across Europe. Through Brexit we've imposed more restrictions on travel and trade. Brexit appeals to that need to feel proud of being independent and British, to feel powerful and excited. We should allow freedom of movement and allow the natural evolution of our people and culture, we can't hold on to old traditions, eventually white British people will cease existing whether we like it or not.