It's a give/take. Even Israel & Spain have fenced borders (the latter on African continent)[i.e. it's not just USA "being racist"].

Every jurisdiction needs to limit immigration more (which EU's dispersed jurisdictions make impossible, by statute) before any one country can tackle any of their other lacks/disputes. The current EU setup is the inverse of USA's, where the feds technically regulate most immigration issues (instead of EU's individual memberstates having most power), but not all.