On Liberty by John Stuart Mill- please explain the meaning of following sentence [closed]

Solution 1:

We use no more … than, or not any more … than to compare two things and say that the first thing is not greater than the second thing. No more than is more formal than not any more than.

Mill is saying that the justification for the majority to silence the minority (the first thing) is not any greater than the justification for the minority to silence the majority (the second thing).

No more, not any more (Cambridge Dictionary)