Increasingly says who?
Prof. Diddy would certainly refute that assertion - I can't remember the specifics but I do recall that in the not especially distant past he has presented statistics showing that the statistical likelihood of a child of religious parents becoming (or remaining) religious themselves is tiny. With non-religious parents that likelihood becomes minuscule.
He has presented his evidence - if we ask him nicely he may do so again if he contributes to this thread; where's yours?
Ooo - please sir, me sir.
Sorry, missed this one - always happy to provide some hard evidence to the discussion.
So the data has been generated by a number of studies, most notably those by David Voas, who is probably the leading academic researcher in the UK on religiosity demographics.
Anyway, here it is again.
If both parents are religious then the likelihood of a child being religious as an adult is 50%
If one parent is religious, the other not, the likelihood of a child being religious as an adult is 25%
If neither parent is religious, the likelihood of a child being religious as an adult is just 3%
So just 3% of children brought up in non religious households end up religious as adults, 97% don't.
Believers come overwhelmingly from believing backgrounds, and believers coming from non believing backgrounds are as rare as hens teeth, and there is no evidence that the likelihood is increasing.