Donald Trump has been ridiculed for claiming that he alone can solve the worldwide problem of IsIamist extremism in the wake of the Easter Sunday suicide bombing in Pakistan.
Mr Trump also claimed that he "knew more about Brussels than Brussels knew" and had predicted last week's terror attack in the Belgian capital.
The Republican presidential front-runner's latest comments on foreign policy also included calling President Barack Obama "insane" for wanting to welcome Syrian refugees, and a claim that doing so would lead to the "downfall" of the United States.
On Easter Sunday dozens of people were killed and hundreds injured when a Taleban splinter group targeted a park in Lahore. Hours later Mr Trump said: "Another radical Islamic attack, this time in Pakistan, targeting Christian women and children. I alone can solve."
The billionaire later added: "I knew more about Brussels than Brussels knew. I was the one that predicted this was going to happen in Brussels and was criticised for it, and now everyone is saying I was right."
Mr Trump was mocked on social media for his "sheer ego". One user said: "You are not Christ."
At the weekend John Kerry, the US Secretary of State, said world leaders he talked to had been "shocked" by the Republican presidential race.
The contest has featured a series of foreign policy statements by Mr Trump targeting immigrants and Muslims.
He has called for a temporary ban on Muslims entering the US, would bar new Syrian refugees, and "send back" those who have already arrived.
Mr Kerry said: "It's clear to me that what's happening is an embarrassment to our country."
Responding on Monday Mr Trump attacked Mr Kerry, America's top diplomat, over his support for accepting Syrian refugees. Mr Trump said: "I'm shocked by him, I'm shocked by his policy of open door, I'm shocked by just about everything he's done.
"This open door policy is catastrophic, this could lead to the downfall of the greatest nation on Earth."
At the weekend Mr Obama called for "openness to refugees fleeing Isil's violence" and recognition that "our most important partners are American Muslims". But Mr Trump said: "It is disgraceful that he could say this, and especially when he talks about coming in from the Middle East, frankly even more so, where they're undocumented.
"It is just insane what this man is saying. I can't even believe that he's saying it, it's inconceivable that he's saying it."
In Mexico effigies of Mr Trump were burned in public squares in several cities in the annual Easter "Burning of Judas" ritual.
Effigies of Mr Obama and drug lord Joaquin "El Chapo" Guzman were also burned.