What islam says about –
Marriage with polytheists
وَلَا تَنكِحُوا۟ ٱلْمُشْرِكَٰتِ حَتَّىٰ يُؤْمِنَّۚ وَلَأَمَةٌ مُّؤْمِنَةٌ خَيْرٌ مِّن مُّشْرِكَةٍ وَلَوْ أَعْجَبَتْكُمْۗ وَلَا تُنكِحُوا۟ ٱلْمُشْرِكِينَ حَتَّىٰ يُؤْمِنُوا۟ۚ وَلَعَبْدٌ مُّؤْمِنٌ خَيْرٌ مِّن مُّشْرِكٍ وَلَوْ أَعْجَبَكُمْۗ أُو۟لَٰٓئِكَ يَدْعُونَ إِلَى ٱلنَّارِۖ وَٱللَّهُ يَدْعُوٓا۟ إِلَى ٱلْجَنَّةِ وَٱلْمَغْفِرَةِ بِإِذْنِهِۦۖ وَيُبَيِّنُ ءَايَٰتِهِۦ لِلنَّاسِ لَعَلَّهُمْ يَتَذَكَّرُونَ
And do not marry polytheistic women until they believe. And a believing slave woman is better than a polytheist, even though she might please you.
And do not marry polytheistic men [to your women] until they believe. And a believing slave is better than a polytheist, even though he might please you.
Those invite [you] to the Fire, but Allah invites to Paradise and to forgiveness, by His permission. And He makes clear His verses to the people that perhaps they may remember.
This is clear instructions of Glorious Qur’an
* A Muslim or belivers should not married with a non-muslim or non-belivers means any polytheists
* The reason behind this also explained in the same verses of Glorious Qur’an, that
* Those (polytheists) invite [you] to the Fire, but Allah invites to Paradise and to forgiveness, by His permission
The simple Logic is that a vehicle can’t ran with combination of tyrs of two different vehicles
If they have different believes , there might be always disagreement with eachother results will be fighting etc.
Then what should they do—👇
If there is a boy and girl who love eachother and want to marry with eachother then first of all they learn one another religious book and try to understand what is actually correct what is wrong belife
Then they try to follow what is right according to both
And if they agree to follow what is common in opinion of both and correct to follow
Then they can marry with eachother