I’m not passing any judgement on his right to stand as a potential presidential candidate, just suggesting that perhaps people might want more from a president than hot air which is impossible to implement in reality, let alone provide protection from terrorists. Sounding ‘tough’ will not do anything to protect anyone, it is policies that can be realistically put into practice that will have a chance of protecting people from terrorism.
Issuing statements that are impossible to implement in reality is either naivety or worse still, using the genuine and understandable fear of terrorist acts as a platform to gain personal publicity.
I doubt very much that ISIS heard his remarks and thought, “On boy, we better watch out because this guy means business, he’s going to ban all Muslims from entering the USA”. More likely they thought, “See what a mess the USA is in, potential presidential candidates are proposing to protect the American people from us by putting forward a proposal that is clearly impossible. All that decadent Western corruption seems to have rotted their brain-cells.”