In order for a time to be nostalgic, does one have to write the bad things out of their memory, or at least simply ignore them?

For example, I am nostalgic for the years I was a child, which was the 60’s. However, I was quite a little privileged white girl and I had no idea there was a civil war going on. I wasn’t exposed to the racism and hatred that other children my age were exposed to.

As an adult, do you have to take into consideration what you know now, before you wax all nostalgic about how wonderful the 60s, or any other time, was?