It all depends how you view the world. For many people, preserving the historical character and demographic of their country is an important issue. It might not be to you, you might consider it stupid, but it is a concern many people have. So much so, they would see illegal arrivals of non historical descent as a more acute problem. One to be prioritised over what can be argued to be improvements to the existing system.
I myself am one of these people. It is more important to me immigrants be sent to Rwanda than offering additional funding or reforming the NHS.
If my interaction with other people sharing your beliefs ( or more accurate my assumptions about your beliefs ), you believe me to be evil. I do not believe I am and I do not believe you, who think the opposite of me to be evil. I believe you are misguided though and wrong in what your priorities are.