It's a bit unfair to limit this principle to some beliefs and not others. To many religious people, religious beliefs are as important to a person as moral beliefs. You may not agree with them, but that IS what some feel.
Now, for political beliefs, if my child joined a neo-nazi political group, you can damn sure expect me to object and try to make him change his mind and force mine on them.
Now, for political beliefs, if my child joined a neo-nazi political group, you can damn sure expect me to object and try to make him change his mind and force mine on them.