Personally I don't agree with the whole 'open borders for everyone' thing, but i certainly think that refugees of war or civil war should be taken in and aided whenever possible, at least screened just a little bit for any radicalization or criminal history. I also definitely think that this whole "migrants cause every bad issue in society" is pure racism, superstition and stigma that completely destroys lives, cultures and relationships. People are not more prone to cause more crime because of their race, skin tone or beliefs. Human societies hold universally similar statistics. the only thing that causes massive discrepancies in the proportions of crime is due to environmental factors, such as poverty, bad laws, and society