Earlier quoted context omitted.
> Because I find people Are you sure these are the same individuals? I can imagine them being different members of a nebulous group where different people talk louder at different times.
The justification is that the group they oppose is against the democratic values they espouse and, therefore, must be violently suppressed by any means necessary, in order to protect their democracy. "Communism/socialism" is usually a straw-man used in those cases.
One need only quote what Churchill said to see that it's nothing of the sort. Unless of course you think the man who kept the world war against nazism and fascism going for a year by himself was himself a fascist nazi at which point words don't mean anything.