There are only two options: Get it out in the open and everyone can lay their cards on the table or shut up and let it blow over.
Eventually most things blow over especially if they're continuing to associate with one another. Most friendships have ups and downs.
Also bear in mind everyone has (their own definition) of what constitutes being a "traitor" based upon (their) expectations.
It's one thing to know in advance what someone expects and ignore them. However it's a different thing to get into "trouble" for being yourself. Some friends are in our life for just a season.
If someone has to change their "core being" to make a friendship or relationship "work" that's a sign they are associating with the wrong people. Know yourself, love yourself, trust yourself. Move on.