Which has the bigger effect on stomach cancer ?

My dad had cancer of the stomach a couple of years ago. He had his stomach removed and a new one made from intestinal tissue. Had chemo & radio and thankfully is now well again.
However the whole family has gone to war with each other laying blame at each other's feet and I have had enough.
From Northern Ireland, diet consisted of fried everything and little fibre, fresh fruit & veg.
Which would be the more likely to have caused the cancer ? My dad smoking or his bad diet ?

I'm not taking part in the fighting. I just want to be able to put down the facts and tell them what COULD have caused it and that nobody can pinpoint it for sure, and also that if anyone is to blame then we are all to blame. I'm sick of mt grandmother singling out my mum and blaming her for what's not her doing.

Like most cancers, the absolute cause of stomach cancer is not known. Three leading risk factors for stomach cancer are:

1) diet
2) smoking
3) chronic infection with Helicobacter pylori.

Dietary factors include:

1) excessive salt intake
2) low intake of fresh fruits and vegetables
3) high intakes of red meat - especially meat cooked at high temperatures.

I hope you find this helpful. Please be careful about placing blame for any cancer. Cancer can take several decades to develop and may be related to experiences/exposures that the patient had decades before the diagnosis.

Best wishes and good luck.

Smoking cigarettes puts huge amounts of carcinogens and other toxins into your blood and lungs. It was the cigarettes, no brainer.

It is really hard to say, because both can effect the cells in your body to cause cancer. See your cell should all start out as "normal" and as you grow and the thing you come into contact with in your life change, sometimes your cells change also and the become a cancer. The thing is that so many things can cause these changes, the air, water, food, smoking, drinking, sleep patterns, and many more. You should really stop fighting over what caused the problem and start taking the time to be thankful you still have him. Also there are many products to improve all the things I mentioned above, you should take a look.