How much Islam do we need to understand before we have the right to say it is nonsense, for which you would not repeat that we need to get educated/lack understanding?
That's true, when you haven't read the Quran and don't believe they'll say "read the Quran"
When you do read it and still don't buy it "you gotta read it in arabic!!"
When you read it in arabic "you have to read it with tafsir"
When you do all the above "you have to read the hadith also"
But then the question becomes this: have muslims studied all the other religions? Have they read all the texts from greek mythology? In ancient greek? With "tafsir"? If not, how can they claim they don't believe it?
My take on the question of the 72 virgins is that the number 72 isn't mentioned in the Quran. And I think if God wanted to say we had 72 virgins he simply would have mentionned it, period. He had an entire book to say so instead of repeating the same stories about Moses and Ad and Thamud over and over.