Are you opposed to 1. high birth rates, 2. immigration, 3. both?
If you answered 2. then you are less wrong (but still wrong) than if you answered 1. or 3.
1. Yes, I am opposed to high birth rates -in others. Unfortunately, that makes me a rank hypocrite because my years of striving for the improvement of the breed have produced six kids and six grandchildren. I plead in evasion of the hypocrisy that I do not advocate government control. It is simply my preference that others who are not blessed with my genes voluntarily practice self-control.
Actually, I count the Liberty to have high birth rates if one chooses to indulge to be of the highest rank.
2. Yes, I am opposed to immigration excepting only immigrants who are exceptionally wealthy or who possess a desirable skill and these exceptions should be actively encouraged by public policy.