This has nothing to do with Canada.

Muslims import their sectarian violence into Canada. It was a born-Muslim Moroccan and a new convert attacked the Mosque.

" ... Suspects identified as Mohamed El Khadir and Alexandre Bissonnette, according to court officials .."

Islam, once a religion of peace, has become a mental sickness today. It has descended into sectarianism where the majority sect is excommunicating  anyone who does not agree with it, leading into senseless violence and terror.

Trump may not have any solutions, he has identified the problem alright. This attack is one more reason to keep them out. There are too many of them already. Do we want more of these guys here?