The big difference is back then, Dwight Eisenhower was the President who had the WILL to implement the operation. Today, we have a mentally feeble man named Joe Biden.
For there to be a way, there first have to be a will to do so. Even when Trump ascends back to the presidency, he will be blocked from mass deportations at every turn. The Deep State, aided and abetted by the Republican Party will see to it.
It was for job opportunity for Americans and especially veterans returning after wars.
Back during the great depression, Herbert Hoover ordered the deportation of ALL illegal aliens in order to make jobs available to American citizens that desperately needed work.
Harry Truman deported over two million illegal aliens after WWII to create jobs for Returning veterans.
In 1954 Dwight Eisenhower deported 13 million Mexicans. The program was called Operation Wetback. It was done so WWII and Korean War veterans would have a better chance at jobs. It took two years, but they deported them!