If you were to cover, it would not be insulting to Muslims. To the contrary, many Muslims would automatically assume that you were Muslim. Please realize that by wearing hijab, you will be perceived by Muslim and non-Muslim alike to be a Muslim woman. So be ready for some curiosity from fellow non-Muslims. Perhaps wearing the hijab will give you a unique perspective and an opportunity to empathize with Muslim women that would not be available to you if you did not choose this step.
And Allah alone gives success. And Allah knows best.
I could not have said it better:
(Took it from this website)