Why does the West look away when Mohammedans engage in child-marriage & polygamy?

Canada: Imam is issuing Islamic marriage certificates for polygamous relationships

 Imam is issuing Islamic marriage certificates for polygamous relationships

“Toronto Imam is issuing religious marriage certificates for polygamous relationships,” by Cosmin Dzsurdzsa, Post Millennial, January 13, 2019 (thanks to The Religion of Peace):

A recent investigative report by the Fifth Estate has revealed that a Toronto mosque has been issuing marriage certificates for Muslims in polygamous relationships.

At some point Canada, and all Western countries, are going to have to decide how much Sharia to allow, and when, or whether to draw the line at a certain point and say “No more.” If that line is not somewhere drawn at some point, Canada, and all Western countries, will become Sharia states.

“This is Islam”: BBC interviews Muslim cleric who claims he has the right to marry a 9-year-old girl

At least 25% of all girls in Niger are married by the age of 15 – and 76% by the age of 18. It is the highest rate of child marriage in the world.
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Under Islamic Law (Sharia) girls can marry at any age, as long as they are “mature enough”.
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In Muslim countries like Yemen, Iran, Afghanistan, Somalia, Pakistan and Sudan girls are considered “adults” and being sold into forced marriages with grown men by their families. There are even some many cases of child marriages in Western countries since (Moslem) immigrants brought this tradition into the West.

Look at this BBC interview. It is from 2014, but nothing has changed since then.
The term “Islamophobia” was created by the Muslim Brotherhood to silence any possible debate about the problems Islamism has got with modernity.
The left uses it to portray anyone who criticises Islam as a “racist”. They ignore the fact that Islam is an ideology that has nothing to do with race.
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There even is an attempt in the West to impose a sharia-blasphemy law to criminalise criticism of Islam. It started when Saudi Arabia and Muslim countries tried to pass a UN resolution to force Western states to criminalise criticism of Islam.
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The Parliament in Canada passed “Motion M-103” to condemn the so-called “Islamophobia” (fear of Islam) in a preparation for a blasphemy law in Canada.
According to the sharia blasphemy law anyone who criticises Islam or the Prophet Muhammad should be killed. In Saudi Arabia and Iran Muslims are executed if they are accused of blasphemy. In Pakistan, where the situation is even worse, radical Muslims use the blasphemy law to persecute the Christian minority.
Is this the law the left wants to adopt?