Amalek? The Amalek no longer exist, at least the ones in their religious text. Further, the amalek were cannanites, existing before Islam.
Now, bibi somewhat recently referred to hamas as "amalek" and people like you have taken it to mean he believes all Palestinian people are the enemy of the Jewish people/state.
Now, one might say any enemy of the Jewish people is a modern "amalek." But, even that is taking some interpretations and not others.
Iirc, the phrase Netanyahu said, which is what I assume you're referring to, is also said on some holocaust memorials. It certainly isn't a call to a German genocide. It's essentially a call to remember.