For a liberal, equal respect demands too much and more than is necessary. For passionate religious believers (and liberal ideas of toleration began with the problems they cause) it is very hard to hold other faiths in ‘equal respect’ without calling into question their own beliefs. But all it requires to tolerate them is to hold off from intimidation and violence.
Indeed, the shift from liberal tolerance to leftist acceptance, the logical result of equal concern and respect, takes us back to where we started before the idea of tolerance took hold. Tolerance challenged the idea that everyone must fit in with a common set of norms, and replaced it with the idea that everyone must abstain from certain behaviours.
The practical differences between these two views came out in the reaction to the decision to allow The Peel hotel to exclude women and straight men. The left blogs I read came down against that decision, because they think that everyone should be accepted equally. But tolerance means letting gay men have their own venues without lesbians who frighten them or straight men who won’t be attracted to them.