It has been reported that the teen terrorist had in fact been in meetings with adult Muslims at the Mosque prior to his callus act, a fact that those at the Mosque denied.

While these places are referred to as places of peaceful worship, may I suggest this proves otherwise and perhaps it's time we shut them all down because the time has come to forget the PC angle and take serious action before more attacts occur.

Should we ban Islam from our peace loving nation before it's too late, that's if it's not already too late.

Yes.
Murder suicides are committed by VW drivers with dud exhausts and using Chinese-made kitchen knives against non-male members of the man's world. A car driver shot a police pig at Tamworth which has
a growing number of men, VWs and kitchen knives.

it's impossible to ban it but it would be easy enough to ban people under 21 from certain Mosques, prayer rooms and certain bookshops.
If correctly reported these events show what we already suspected about mosques and Imams, very few Muslims have the time or the inclination attend a Mosque on a regular basis so they've become gathering points for society's loafers, nutcases and public nuisance types. Imams are usually old men who grew up in very different societies to this one and who, in this case at least don't seem to interact with the people in their congregation, especially the young.
The role of Middle Eastern gangsters in Curtis Cheng's murder is suspected but not clear, this has also been something we "racists' have been complaining about for years, Middle Eastern gang crime is peculiar in that they are so brazen, so extreme and seem to want public attention which leads us to wonder if there's more to these gangs than meets the eye.

The police are doing their best to find out what exactly happened and when, It is useless to jump to conclusions until the truth is known. It makes for useless reading, full of proviso’s.

When the truth is known we can then make judgment, The Mosque has CCTV so anyone that entered it will be known and traced to see what their part in this despicable act was. All we know at the moment is that kid did not get those sort of ideas on his own, plus a gun

The Razor gang wars, 1927-31

The suburbs of Darlinghurst, Woolloomooloo and Kings Cross in Sydney in the late 1920s and early 1930s was a world in turmoil with vicious ‘razor’ gangs battling for control of the criminal underworld. The upsurge in organised crime in the late 1920s is usually attributed to several factors:

•the prohibition on prostitution
•the prohibition on selling cocaine through legalised outlets such as chemists, and
•six o’clock closing of public bars and hotels.

The razor gangs were the criminal underworld that ran organised crime often centred on these three areas. They are called razor gangs because of the cut throat razor (a straight shaving blade) that was the weapon of choice, especially after the Pistol Licensing Act of 1927 meant automatic gaol time for anyone caught carrying an unlicensed firearm.

Gang leaders

The razor gangs at the heart of the razor gang wars of 1927-31 were led by two very different women: Tilly Devine and Kate Leigh.

Tilly Devine, known as the ‘Queen of Woolloomooloo’ ran a string of brothels centred around Darlinghurst and the Cross, and in particular, Palmer Street. Kate Leigh, known as the ‘Queen of Surry Hills’, was a sly groger and fence for stolen property.

Tilly and Kate’s battle for supremacy led to a running battle in the streets of Sydney that left many people dead, disfigured or doing gaol time.

A map of Sydney c.1927 (SR Map 6235) showing where the Razor Gangs controlled.
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Dovo razors are available with a variety of premium handles and blades, with 5/8” varieties recommended for general use, while 6/8” are best for experienced shavers. Whichever you choose, shaving with a cut throat razor and a shaving brush is always a special experience.

Nicknamenick.
So you have to go back to 1927 for your example of White gang activity?
You'll be surprised to learn then that the Sydney underworld of that era included Italians, Jews, Irish, Aboriginals, Chinese and Jamaicans, Australian gangs have always been multicultural as they are now, if you're handy with your fists and light on your feet, you're in.
That's not the case with the Middle Eastern, African and Asian gangs of 2015 and there are no all White crews around that I've heard of, all the real suburban youth gangs besides the ones I've named are made up of kids of various backgrounds who band together for protection from the Lebanese, Sudanese and Vietnamese.