Since there most definitely were Christian Vikings even in the early days (later they were all Christian), it seems quite probable that some would have also converted to Islam.
But I agree that embroidered pieces of cloth doesn't really say much at all.
It's also pretty strange that the article seems to say that Vikings got the idea for an eternal life after death from Islam. First of all there are very similar ideas in Norse Paganism (cognate to Greek and Roman Paganism), even if it's not in paradise. Secondly the idea also exists in Christianity, and by the 9th century most of Europe, and many Vikings, were of course Christian.
But I agree that embroidered pieces of cloth doesn't really say much at all.
It's also pretty strange that the article seems to say that Vikings got the idea for an eternal life after death from Islam. First of all there are very similar ideas in Norse Paganism (cognate to Greek and Roman Paganism), even if it's not in paradise. Secondly the idea also exists in Christianity, and by the 9th century most of Europe, and many Vikings, were of course Christian.