Allow users to edit ranges

Hi,

I have a sheet which has many columns in it, all columns are protected except column B. When I want to enter data always I have to insert a column in column B.
When I clicked insert button, my B column move to C and B column become protected and C become unprotected.
My query is always I want B column should be protected (even if i clicked on insert column button too).
Please help.

Thanks in advance.