Perhaps MWI v. Copenhagen (or other choices) is testable and has already been tested and has won, in which case I am at best ignorant and at worst the quantum equivalent of a creationist. In which case your wearing garlic around your neck to try to ward me off is totally sensible.

Or perhaps MWI v Copenhagen is testable but has not been tested yet. In which case we don't yet know which of us is supporting the geocentric universe and which is on the side of heliocentrism, and won't know until the tests are done. In which case casting out the non-believers is almost certainly a gigantic step into the sewer for a rationality site.

Or perhaps MWI v Copenhagen isn't even testable. In which case you might as well just register as a religion so you can get all the tax benefits anyway, since claims to rationality will be totally subverted by requiring uniformity on a "belief" which can, even in principle, never be anything but signalling.

It doesn't seem to me that there is a possible state in which your rejection of non-MWI is even vaguely related to any kind of rationality.

What am I missing here?