You can forecast what Europe will be like in 50 years, you've done it more than once on this thread. Once you predicted 15 or 20% and more recently 20%. You're getting narrower in your predictions, and your prediction agrees with the original article quoted on this thread, another crystal ball source, no doubt!
Extrafire, I have already said that the 20% is probably a reasonable figure. As to forecast, I haven’t forecast anything.
Again, when I said that I hope Europe looks pretty much the same as it does today (perhaps a bit more Muslim), that is a hope, not a prediction.