The only reason we are here [maybe not you specifically], is because some of our cultures were able to fend off the attacks of other cultures, and maintain our boarders, and our common bonds, and our self-determination.

For example, a great number of European territories and countries experienced over a hundred major Islam/Muslim incursions (over the last 1500 years), where the people were killed, raped, and/or taken into slavery, and the territories were pillaged - but they managed to eventually push them out and keep them out. We would not exist if this did not happen.

For another example, most groups that are coming into EU right now identify very strongly with one-another on racial and religious grounds, to an extent that is not productive. And if these people grow into the majority, they will change the country (economically, socially, etc) in ways that are opposite to the existing norms. And you will become a stranger in your own home.