Original sentence: It is quite probable that this is true due to a marriage between a religious and non-religious person; it is not unusual for the non-religious to self-describe as religious when older due to pressure from partners and the community (note that this phenomenon is far less common in Europe, where atheism is if anything more socially acceptable than religiosity
Edited sentence: It is quite probable that this is true due to a marriage between a religious and non-religious person, and the more reasonable one (non-religious) will become religious merely to appease his or her partner