If white bread is unhealthy are naan and pitta breads unhealthy?

Stomach -fillers

the less processed, the better. white bread is heavily processed and usually contains some amount of bleach for the white color (this is bleach that is NOT MEANT TO BE EATEN)

It depends on what you mean by "unhealthy."  There's a lot of conflicting information so you need to establish what you consider healthy or not so much:

1.  All bread-type products are made with wheat and other grains.  

2.  All grains are carbohydrates.  Carbohydrates are turned into sugar in our bodies and used as fuel.  Most people eat too many refined carbohydrates, but that doesn't mean any particular food is unhealthy.

3.  All grains contain lectins -- type of defense mechanism in plants.  One lectin is gluten, but there are many others.  These lectins cause inflammation. 

4.  Lectins are found in the bran or outside of grains.  That means that "whole grain" products have more lectin than "white".  If lectin is a problem, then whole grain products are less healthy for you than a white one even though whole grain product have more other nutrients.

5.  Any grain-based product that is shelf-stable for more than a couple of days has preservatives in it.  Preservatives are not healthy.  If you are going to eat bread product, it is healthier to purchase one the is baked in-store without artificial preservatives, and is only going to last a couple of days.

It's healthy, but integral whole-grain is healthier.

Anything in moderation is fine.

White bread isn't unhealthy, but naan and pita are also white bread.