Reminds me of the Office episode where Michael Scott says "The customer is always right. She was wrong. Well she's not our customer anymore"
Political involvement even if you "can't remain silent" just makes you not a scientific journal, it's fine if that's how you want to use your editorial purview.
No one's suggesting they 'stay silent'. Not endorsing a specific candidate when it appears to actually undermine trust/interest in their research and in science as a whole isn't staying silent. Ignoring their own research while asking others to 'listen to the science' seems an odd position for a journal to take.
Political involvement even if you "can't remain silent" just makes you not a scientific journal, it's fine if that's how you want to use your editorial purview.