The Wikipedia article rightly identifies this idea as an Islamophobic conspiracy theory and here you go actually assuming the subject is in fact true. There is

The Wikipedia article rightly identifies this idea as an Islamophobic conspiracy theory and here you go actually assuming the subject is in fact true. There is no evidence the faith or the majority of adherents intentionally encourages people to marry in order to proselytize. Of course there are extremists who might believe that however but this conspiracy theory doesn't seem to make that distinction.