English may not be your first language. I'll explain "Steal my Heart" is an expression for when a lady falls in love with a guy. It has nothing to do with wearing masks.
I'm not an extremist. I'm a 'normal' american with 'average' values.
The definition of a leftist is: A person belonging to the political left and usually identifying with the radical, anti capitalist, or revolutionary sectors of left politics. Includes anarchists, marxists, communists, socialists, and all other explicitly radical left ideologies.
labels are ways we use to identify people to others. By saying you are a leftist I'm letting everyone else know that your views may be on the extremist side of the left.