India as a whole is diverse. Canada is NOT getting immigrants from all of India but rather from 2 states (mostly one). Please learn about the issue first.

The majority of Indian immigrants to Canada are coming from one state, Punjab, so the benefits of diversity within India is not necessarily reflected in the Indians coming to Canada.

Because there are so many Indians around, newly arrived Indians tend to spend most of their time with other Indians, and as a result don't integrate with the rest of society as much as previously waves of immigrants did. Canada is a cultural mosaic, but a certain degree of intermixing and assimilation is necessary, in my opinion, to preserve social and national bonds.

It's what the Irish said to us Italians when we were immigrating to Canada in droves.

It's a dog whistle for 'keeping Canada white'. There are a lot of racists in Canada.