Who gets to define "hate"?
With the plethora of microaggressions out there now, I'd be mighty cautious about any reduction in freedom of speech, and especially careful about what is called "hate" speech.
If I can be freely derided for simply being a straight, white, Christian, male, shouldn't similar standards apply to my speech about any hypothetical sexually deviate, non-white, non-Christian of indeterminate gender?
If so, then we're just talking speech, here, whether in good taste, polite, or otherwise, and the whole "hate" classification should be removed.
If not, there is an inherent bias in the system that reeks of the very thing it proposes to eliminate.
People will generally avoid that which offends them, but if issues cannot be discussed without throwing up the 'hate' flag and silencing opposing viewpoints, there will be no release of angst nor exchange of ideas, just a heavier weight on the social pressure cooker vent.
