Given that the Eurabia myth is predicated on these individuals outbreeding us, the fall of birth rates is very relevant.
Your idea of the eurabia myth is a myth itself. I'd call it a straw man, but straw men are more substantial.
The "Eurabia myth" is not JUST about demographics. It is about pigheaded fanaticism and the complicit willingness of Eurocrats to cower before Islamic demands, to permit promiscuous immigration levels to keep the welfare states going, to blithely oversee the cultural destruction of their own nations. Islam can go nowhere with the active aiding and abetting of the West, both at the governmental and corporate levels.
Ayup. A weak hand beats no hand in any card game.
1. Falling birth rates in the Muslim countries does not necessarily mean the absolute numbers or rate of immigration into Europe will change. The reasons for that immigration still exist, as the Muslim countries are still third-world cess pools overflowing with poverty, desperation, violence, and oppression.
2. While birth rates of current Muslim emigrant countries may be falling, they are still higher than native euro TFRs, as are the TFRs of Muslims already in Europe. Even if it takes only 3 or 4 generations for Muslim immigrants to lower their TFR to native euro levels, that is long enough to produce a whole buncha new bouncing baby Mohammeds.
3. With Wacky Kadaffy no longer taking bribes to keep sub-Saharan black muslims from traipsing across Libya and across the Med to euro-land, the euros can expect many more of them. And THEIR TFRs are still very high.
Oh, and my data on my last post was from CIA Factbook 2009, while the data you sorta cited was 2011. I doubt very much that if one takes statistical confidence of both sets of data into account WRT Muslim countries, that one could say with statistical confidence that either data set is "better" or more accurate. Muslim countries are not known for punctilious records-keeping.