Does a loan with interest taken in the name of the pilgrim affect the validity of performing the Hajj pilgrimage?

What has been mentioned does not affect the validity of the Hajj. If the Shar’i (Islamic legal) capability for Hajj is met, then a Muslim must perform Hajj. You must repent to Allah for assisting your friend in a forbidden act, while clarifying the Shar’i ruling to him and advising him to repent.