unthinking response

How is a reflexive, unthinking response like what Padma Lakshmi provoked?

This unthinking response sums up why I have resigned from @UKLabour today.

“These are conservative groups with intolerant tendencies, who use a moralistic, prejudiced message to mobilise an increasingly massed and unthinking response.”

The fierce and seemingly unthinking response of Republicans to Obama’s initiatives has stemmed in part from the weakness of their position.

Ewing felt the thing writhe in his clutch, then felt a sudden terrible relaxation, and his pressure ceased in unthinking response to this.