It's all part of the culture of the Arabian Peninsula.
See the Apostle Peter's inquiry about a 'guest wife' for himself while in Rome.
Yes, I know we don't do that anymore, but then we, Christian and most Jews, have been thousands of miles from Arabia for thousands of years.
There are plenty of legitimate reasons to have a Crusade, but this isn't one of them.
SO9
Could you please cite the reference you made about Peter's guest wife? Is it in scripture? Maryxxx
Book, chapter and verse please. I can't find anything about this in the bible