Quite simply, if an app is being used to target a build-up of people for violent / targeting reasons, then I firmly agree with Apple’s decision to remove such an abhorrent app.
How stupid are these lawyers and politicians to go against this?
You sound like a person who believes everything you read in the newspaper.
Consider this (and I make up figures to illustrate my point):
-- e.g. Facebook messenger, iMessages, email etc are used by 100 million people. One hundred use it for criminal purposes. Do we ban everyone from using it?
-- the HongKong.live app was used by 1 million people to avoid the police. One hundred people (possibly plants by the Communists) used it to attack police. Do we pull the app?
You see, it's how you spin it.