Two friends have different opinions and the group interprets the comparison as the end of the relationship. I propose to distinguish the topic discussed from the overall value of the relationship.
In the example, one sentence clarifies that dissent is about a specific topic. This does not require tolerating offenses or discrimination.
However, it allows not to turn every respectful difference into a public deployment. A community capable of discussion leaves room for nuances and does not continually ask for proof of belonging.