It’s a complex and polarising issue. The main problem is that some, sometimes most, of immigrants don’t want to assimilate. They are creating ghettos, don’t respect local laws. Other issue is that governments prefer to spend tax payer money for accommodating immigrants instead of solving nation’s issues.
I wouldn’t limit immigration per se. I would limit unchecked illegal immigration and spend more money on assimilating immigrants that want to contribute to a country they moved into.