Your comment is infuriating unlyperceptive. OF course, you offer nothing other than your exalted, unsupported opinion to make your case.
Is his travel ban a complete answer? Certainly not. Equally certainly, we would be safer if we did not permit any Moslems to enter the USA. That may be impractical, but it would go a long way toward protecting Americans from terrorist attacks. What Trump proposed was reasonably within his powers, and would reduce the the risk of terrorist attacks. He needs to go further, but he made a start.
Only a foolish people would permit large numbers of people whose ideology is one of suppression of and domination over people who do not share their ideological moorings. Cicero observed that a nation may survive foreign attacks, but it cannot survive sabotage from within, and that is what adherents to Islam bring to the USA. With Obama we had the Moslem Brotherhood close to the pinnacles of political power in this country- that would probably have continued under Hillary.
For all Trump's limitations- and they are considerable- he is doing what can be done to eliminate the threat from within from those determined to impose Islam on America. God bless him for that!
16 years since 9/11 and not Islamist one terror attack has been successfully perpetrated on American soil. (Several by American RWs, but none by Muslims.) DHS has the situation under control. It's a non-problem.