Yes what you say is an example of racism, and that particular brand of racism may be something that you do not believe, but it does not mean that what you do believe is not in itself racist.

Just because all men are human, it does not mean that all humans are men.

Likewise, questioning immigration does NOT make someone a racist, however questioning immigration on the grounds you do, of the mixing of cultures resulting in suffering, is not only illogical, but is a form of racial discrimination.

Have a look at where there are problems with different racial and cultural groups in the UK. What is the root cause of the problems in these areas? If you look closely, you will see it is not that there are people of different ethnic origin living in England, it is usually poverty, drugs, lack of education etc, where it is too easy to make a scapegoat of immigrants.