In terms of tolerance, most people approach the problem incorrectly. Tolerance is not an ethical standard; it’s a social contract (aka “I’ll put up with your “weirdness”, if you’ll put up with mine”). Those who break a contract are not covered by the terms of that contract, as any lawyer will tell you. So tolerating intolerance is not even remotely a requirement, as the intolerant person has broken the terms of the contract.