The "Stop Hate Crimes Act of 2025" proposes to amend Section 249(a) of title 18, United States Code, which governs federal hate crime offenses. The primary goal is to clarify the causation element required for an act to be prosecuted as a hate crime. Specifically, the bill replaces the phrase "because of" with "if" when describing the link between the victim's protected characteristic and the offense. It further stipulates that the victim's race, color, religion, national origin, or disability must have been a "contributory motivating factor" for causing or attempting to cause injury. This amendment intends to broaden the scope of the federal hate crime statute, making it applicable even when the protected characteristic is not the sole cause of the crime.