FD is right -- there is no direct link.
However, in genetically susceptible populations, such as the Gilbert Islanders from the South West pacific, the Nauruans or the Solomon Islanders to a lesser extent, the introduction of the 'Western' diet -- i.e. high in naughty fats and refined sugar -- leads to a dramatic incidence of diabetes in a population where it was previously unknown.
Personally, I think that if you do eat crap for your whole life it will rebound on you and there is evidence to support that. Like FD says, though, moderation...
QDM