Correct, the President of the United States does not have the power to preemptively immunize individuals from future criminal conduct. However, the President does have the constitutional authority to grant pardons or reprieves for federal offenses that have already occurred. This power is granted by Article II, Section 2 of the U.S. Constitution, which gives the President the ability to forgive or lessen the penalties for past crimes, but it does not extend to preemptively pardoning people for crimes they have not yet committed.
The idea that a previous president can preemptively pardon people is a jewish trick and requires mental gymnastics. Certainly he can claim he pardons future crimes but the justice system can prosecute them anyway.