How can it be so hard to be nice to others? Everybody disagrees with everybody else on something. Everybody has false ideas about the truth. Do we toss a kid in a meatgrinder when it has a weird idea about society? No, we include it in our discussions because opinions change when they are challenged. But when they cross the age of 16, or is it 18?, then they suddenly become demons that we need to get rid of. The cancer of our society. Where do you draw the line?
If you honestly think that you have a moral superiority that gives you the right to tell people what to do just because they are stupid (or pick any other negative attribute), then know that there are a lot of people to whom you are literally stupid (they are more intelligent and know more than you). Would it be okay if they told you what to do? If they tried to silence you? Ignored your desperate calls for help, which they think are stupid and wrong?