One of the reasons why Erdogan lost Istanbul was due to immigration. You can't just let migrants come into the country - attack, rob and rape our people whilst not even being able to prosecute them after the fact. Or at least identify them before they come in and put them in a detention center to isolate the good migrants from the bad one's.
This is the problem I have with Islamic conservatives because they think that 'one ummah' is a means for everybody to migrate everywhere and don't take into the account any negative consequences.
Same type of shit is happening in Bosnia recently and quiet frankly is pissing me off because muslim led government won't do shit.
Open borders spelled the end for many Islamic Empires themselves.
When you have open borders the country cant maintain this much people not to mention this allowed various other peoples to infiltrate the country not to mention criminals and bandits but also the spread of disease too among immigrants.
Strong borders benefits the country itself.