…or doesn’t, as the case may be.
First you bring in a new ideology, say, one that’s manifestly absurd and overturns the most basic facts about humanity which have been understood by every culture throughout all of human history. But you say that this new ideology is deeply important to some people–a few people, which makes them a vulnerable minority who must be protected, but an increasingly large number of people, which demonstrates that however contrary this ideology is to science and common sense, it must be true.
You insist that people tolerate this ideology out of love and kindness to those who are different from them, out of charity and humility, and out of regard for a persecuted and misunderstood minority. Somehow, you convince influential people to begin tolerating, then advocating for the tolerance of, what is obviously untrue and ultimately misanthropic.
Then, with a critical mass of social support, you begin bullying opponents of the new ideology into silence. When someone speaks out against the nonsense you’re promoting, you arrange that anti-bullying educational efforts will be used to get their teachers, peers, bosses, etc., to call them bigots, discipline them, and possibly fire them.
In a late stage of the effort, between the general social stigmatizing of reasonable opinions and making such opinions actually illegal, private social media platforms begin declaring that speech against the new ideology is totally out of bounds and must be silenced. There can be no discussion, because to even disagree about this ideology is hatred.
Tolerance at its finest.