Short answer
No. Marriage outside a biradari does not automatically mean abandoning family or cultural identity.
Islamic Guidance
What Islam teaches
Islam permits people to retain lawful cultural practices while avoiding customs that conflict with Islamic principles. Different families can build a respectful household while maintaining healthy cultural traditions.
Practical Guidance
What you can consider
Discuss cultural expectations before marriage, including language, festivals, family visits, food habits and children's upbringing. Many disagreements can be prevented through honest discussion.
Sources
Qur'an 49:13.