WHEN IS IT OK TO NOT KEEP AN OPENED MIND AND OPENED HEART?????

Since I was a little girl I was taught to love everyone the same regardless of race or sexual preference. That we were all born the same and to not judge someone on how they lived their lives. So, from a small age I saw people for who they really  were. If they were good or bad it wasn’t because of the color of their skin or their sexual preference it was because of their character. Sadly I’ve come in contact with people over the years  who are prejudice or racist and it truly breaks  my heart but what do you do when it’s really close to home? what do you do if it could effect your own family and how you raise you’re own children? What do you do if accepting this person(s) goes against everything you believe?  I guess you keep an open mind and open heart. That just like I was taught when I was young to love everyone, including the racists and bigots. But wait, how do you love someone so closed minded??  do  the racists and bigots fall into that category? Am I suppose to accept EVERYONE for who they REALLY are? Racsism and all? When is it ok to close your mind and heart to someone else? When is it ok to be closed minded yourself?