Cousin Marriage Is Halal:

Do you know that Allah ‘Azzawajal has made cousin marriage halal. Do you know more than Allah

The Prophet. Peace be upon him. Had four daughters. He married two of them. to not just cousins. First cousins as for the non-Muslims. Let me ask you people this. Before the Industrial Revolution, humans for all known human history married their cousins. All of them did completely fine.