The Law of Return for Israeli Jews

There is no proper immigration policy in Israel. If you have some basically family ties, if there is some form of Jewish heritage, then you could quite easily get citizenship,. But if you are not, then it would be very difficult. For example, someone let's say an Israeli citizen who is not over Jewish background wants to marry someone else. They regard as basically citizens who haven't implemented their right yet. It is a very tedious process and also it is not well defined in the law.