OK. Let's look
Some well known Islamic Countries
Homicides per 100,00 population
IRAQ 8
Somalia 8
Palestine 7.4
Pakistan 7.7
Afghanistan 6.5
Albania 5
Iran 3.9
Some well known non-muslim Countries
Canada 1.6
Australia 1.1
United Kingdom 1.0
New Zealand .0.9
Sweden 0.7
Japan 0.3
Iceland 0.3
He still won't be convinced.
There will be yet Another justifiable Reason.

Why don't all these People that See all the sweetness & light in these Muslim
Countries move out & live there.
It seems that millions of these Muslims like it so Much that they Leave these Havens
Of Peace & Tranquility to live in the western world they Hate so Much.