It depends on what you mean by "leave." If by "leave" you mena become convinced that everyone in your family is going to hell because of their faith, and that they require you to preach to them the true gospel whenever you see them, yes that could cause problems.
SD
I'm sure they'd require an explanation. So what if you just left and didn't feel the need to preach?
More than 50 years ago, when I left the RCC, the whole idea caused great problems in my family and it caused greater problems with our families when my Catholic wife and I decided to Church School our children in a Protestant Church.
Even in my extended family I doubt the same level of problems today.