The Short Version
Extensive peer-reviewed research confirms that ideological identity shapes how people interpret identical visual evidence, including protest footage and news imagery. The core phenomenon — partisan groups diverging in what they perceive from the same stimuli — is well-established across multiple independent studies. However, the claim slightly overstates the precision of the evidence: most direct experiments test recall, memory distortion, or still-image framing rather than controlled real-time interpretation of identical video. The word "systematically" also implies a more universal and unconditional effect than individual studies demonstrate.