Are all Pakistani/Indian (Muslim) men unfaithful when in arranged marriages?

I once worked with a married Pakistani, Muslim man, who would not take "no" for an answer. He insisted and insisted (for months) until he finally caught me at a vulnerable time. His lust was so intense that Ramadan did not even stop him from flirting and getting with me. He claimed he's in an arranged marriage and does not even love his wife and even went as far to tell me he fell in love with me. I warned him that he is still a married man, and confessed I did not feel comfortable having an affair with him, but this did not stop him. He continued to flirt with me, IM-ing me and texting me on a daily basis and I eventually grew feelings for him.

I made sure I knew where we stood. I asked him whether we were friends and argued that friends do not kiss nor are intimate and he answered he had not looked at me as a friend ever since the affair started. After I gave him an ultimatum, that's when he confessed he did not have the balls to leave his wife, adding his concern for his son and dependant parents. Why would a man who already knew the consequences of his actions, not have the intention and/or nerve to leave his wife, when he had the nerve to cheat on her? Especially a man of his nationality/religion? I am Latina and this was my very first experience with a Pakistani, Muslim man and I must say, it was very disappointing. Why even bother with the arranged marriages if they don't even stay loyal? I honestly thought they took their religion much more seriously, especially since they fast for an entire month. I guess it's like most religions: HYPOCRISY.