If they left before the mandate ended or were from lands that became part of Israel by the ceasefire, then no they were not Israeli, but if they had family that remained they could apply for entry through reunification programs. Israel wanted family to be together.
Those from Israel could have been part of the 100,000 offered return. Blame falls on the arabs for the refugee tragedy.
This thread is about Arabs who lived within the borders of Israel and stayed within the borders of Israel. They never left.
They became citizens of Israel as soon as the Jews did.
But because they fled their homes, even though to another place inside Israel, they lost their lands and Israel didn't give it back.
Read the article at the start of the thread. This is about Israelis, in Israel, who stayed in Israel, who had their land stolen by the Israeli govt.
Millions of dunams of land.