However, I think that, when most people use the word "intolerance" today, they include things like speaking racial slurs or expressing any negative emotion towards a demographic group. There are contexts in which these things are done, and manners in which they are done, in which, yes, they do give a significant signal that the speaker is the type who would cheerfully escalate to aggressive violence towards the targeted group; but also contexts and manners in which they do not give such a signal.
I think there is a distinction to be drawn here, between "always tracking whether this is likely to escalate to criminal action" and "just attacking anyone who vaguely resembles a known 'intolerant' group". The latter is essentially an autoimmune disorder, which has led to massive collateral damage and its own discrediting. The former ... has a danger of turning into the latter, certainly (which has an interestingly meta angle to it), but is there any version of it that is well-protected against that fate? I expect there's room for improvement compared to earlier versions. I don't know if it can be done well enough to be worthwhile.