How Do I Stop Employees From Arguing About Politics?

The core issue

This is a performance and workplace conduct matter: two employees are disrupting others with repeated loud arguments during work time, regardless of topic. The fact that religion touches the content creates perception risk, but the conduct you're addressing — volume, frequency, and distraction during paid hours — would be a problem whether they were debating foreign policy, sports, or lunch spots.

Steps for this potential path

1. Meet with each employee separately, same day, same script. HR and the manager together. Frame it identically: "We need to talk about workplace disruption. You and [coworker] have been having loud, extended discussions during work hours that are affecting others' ability to focus. That needs to stop." Do not characterize the topic, do not reference religion, do not take a position on the substance of what they're discussing.
2. Set the expectation clearly. "Conversations during work time need to be work-related and at a volume that doesn't disrupt others. If you want to talk about other topics, that's fine on your break, away from workstations, and at a conversational volume. If you and [coworker] can't keep those conversations civil and brief, don't have them here."
3. Confirm they understand and document. Ask each employee to acknowledge the expectation. Follow up the same day with a brief email to each summarizing the conversation: "As we discussed today, work-time conversations need to be work-focused and conducted at a volume that doesn't disrupt your coworkers. Thanks for your attention to this." Keep the documentation identical in tone and length for both employees.
4. Brief the manager. Make clear that the next step if it continues is a documented verbal warning for workplace disruption, applied to whichever employee (or both) continues the behavior. The manager should intervene immediately if it happens again — not with "knock it off," but with "this is the conversation we had with HR; it needs to stop now."
5. Monitor for retaliation or escalation. If either employee claims after the meeting that they are being silenced for their religion or that the other employee is harassing them based on religion, treat that as a separate matter requiring an immediate follow-up conversation and potential investigation. That has not happened yet, but the meetings may prompt it.

Key considerations

California's off-duty political activity protections do not shield on-the-clock disruption — you are not disciplining them for holding or expressing views, you are addressing the impact on the workplace during paid time. The even-handedness is critical: identical meetings, identical language, identical documentation. If you treat one employee more harshly or characterize one as the instigator, you create exposure to a claim that you targeted them based on religion or viewpoint.

The religion element is in the content, not the conduct, but that line can blur quickly. If either employee escalates to comments that are derogatory about the other's faith, that becomes a potential harassment issue requiring investigation. On the current facts — policy arguments that reference religion but are not personal attacks — you are not there yet.

If the disruption continues after the expectation is set and you move to formal discipline, apply it evenly. Do not try to parse who "started it" on any given day unless you have clear evidence one employee is instigating and the other is not engaging. Disparate discipline is where this goes sideways.

What would change this

If either employee claims harassment based on religion — either now or after your conversation — you have an investigation obligation that precedes any discipline. If the arguments have included personal attacks on faith that you were not told about, the framing shifts from disruption to potential hostile environment.

If this is a unionized workplace or you have a handbook policy on workplace conduct or respectful workplace standards, apply it and reference it explicitly in the conversation and documentation — it anchors the expectation in pre-existing rules rather than a new response to this situation.

If the volume or grumbling from other employees rises to the level that someone formally complains, document that separately — it strengthens the business justification for acting and shows the breadth of impact beyond the two employees involved.