We've lost all notion of the meaning of religious freedom.
Religious freedom does not mean having the freedom to do only what your religion requires.
It is the freedom to go above and beyond what your religion requires.
Because that is the very nature of Christianity.
Christianity is not about maintaining minimum requirements. That minimalist spirit is antithetical to true Christianity.
Christianity is about attaining your maximum spiritual potential, i.e. becoming as holy as possible.
And witnessing with a cross is part of that exercise.