Baffling responses, expressing scanty knowledge and more of opinions. Anyway, the sharia'a of those prophets was not the same as that of Prophet Mohammad. All prophets had been monotheists but having their own sharia'a which was provisional and not Universal like the present sharia'a of prophet Mohammad. Whatever was the status of Prophet Nuh's and Prophet Lot's wives was not in contradiction of their sharia'a. That is why they married them. Qura'an if understood with care does not permit even women of Book to be married with by the Muslims until converted to Islam. Very explicitly ordained in 2:221 ("Do not marry **Mishrikat (**those who associate partners with Allah) until they become believers.

In Nowadays Christianity and Judaism monotheism have almost become extinct. They can, due to their belief system marred with interpolations and traditions, simply be classed as Mushrikeen. Therefore it becomes imperative for Muslims to make sure they convert Women-of-book to Islam before marrying either one of them. This will also meet one of the familial requirement of Kuf. (Allah knows best). For further reading on the topic access https://shakir2.wordpress.com/2015/06/22/muslim-women-marrying-non-muslim-men/

The sharia'a of those prophets was not the same as that of Prophet Mohammad. All prophets had been monotheists but having their own sharia'a which was provisional and not Universal like the present sharia'a of prophet Mohammad. Whatever was the status of Prophet Nuh's and Prophet Lot's wives was not in contradiction of their sharia'a. That is why they married them.