I truly apologize for not responding earlier. This is an ancient question and I never put aside time to answer it, please forgive me.
One would have to first stop seeing the angels as “helping” Allah (swt) or partners. Angels, like us, are the creation of Allah. However more so, Angels are pure from committing any act that is displeasing to Allah (swt). They are entirely subservient to God and can never disobey as it is not in their nature or capability to be able to.
We know that angels are limited beings that vary from individual to individual. Some are consigned with the responsibility of meting out punishment in this world, and some in the Hereafter. Some are entrusted with the task of writing the deeds of men, and some write the decrees of Allah (SWT).
Some manage the day-to-day affairs of the cosmos, and some are messengers who carry divine revelation. Some inspire the hearts of men and some are protectors and helpers of the believers. Some have higher rank and give orders to others. Some are responsible for sustenance, some for rain, and some take the souls of people when they die. In the same vein, some angels are perpetually in a state of prostration, some continually bow, and some forever glorify Allah (SWT).
Some eternally circumambulate the Ka’bah. In all cases, each angel is assigned a specific task. He neither has power to perform more than what he has been commanded nor to fall short of his task. This is in their “DNA”. This is all they know.
Very sorry for not getting back to you sooner! Islam has very specific rights that are granted to women in marriage—and I say women because these rights are grant to both Muslim and non-Muslim women and must be respect and upheld throughout the marriage. The same rights may not be granted to the Muslim woman by a non-Muslim man.
For example, a Muslim man is obligated to provide for his family the best he can. His wife has the right to work but she has the choice of keeping her income or using it to help her husband provide. Other rights such as divorce, sexual rights, and inheritance are just the tip of the iceberg when it comes to Muslim women’s rights.
If your friend thinks a non-Muslim man is right for a Muslim woman, then that man should seriously consider learning about Islam and converting into it before marrying, this is my suggestion.
Insha’Allah, God willing this helps!