The term "girlfriend snatcher" is not only derogatory but also disrespectful towards the people involved. Rather than using such offensive language, we can use various synonyms to describe the behavior like "love rival", "homewrecker", or "intruder" for someone who interferes in a relationship leading to its breakdown. Other harmless terms like "love interest", "paramour", or "beau" can be used to describe someone who is in a relationship with a person. It's important to remember that using hurtful language is never justified, and we must always strive to be respectful of others' feelings, especially when it pertains to their relationships.