There are 4 factors known by epidemiological studies to increase risk of breast cancer:
1) fewer children and delaying first childbirth
2) decreased breast feeding
3) the birth control pill (and exposure to other hormonal medications)
4) abortion.
All other supposed risk factors are just that, theoretical with no proven link in epidemiological studies. This includes diet and environmental exposure to toxins.
You can argue from scientific fact and medical research, or you can argue from presumptions, assumptions, anecdote, and ill informed personal opinion.
The readers here can discern the difference.
Would you be as kind to let us know what a "proven link" is compared to an "unproven link".