It seems that, in some cases, immigrants import their biases with them, and stick to them instead of adopting cultural aspects of their host countries. This can, in a sense, make them less open minded and tolerant than non-immigrants. You can see examples of this all the way back to Gean immigrants to Russia and South America.

I have no problem with this, after all immigrants are by no means obliged to be assimilated. It becomes a problem when politics come to play. E.g. Turkish nationalism, Erdogan has pretty solid approval ratings among German based Turks. This doesn't affect German culture much, so. In case of Indian nationalism, heavily leaning on India's caste system, it is different. Indian immigrants tend to end up in managemebr positions more often than, e.g., Turks do. So they affect company policies and culture more. And in the case of caste discrimination, something most non-Indians have a hard time understanding, it can co-opt whole organisations. And in the case of social media it can have a massive impact on culture in general.

That's why those talks, like the cancelled one at Google, are so important.