It's hysterically funny, strawmanning at its best.
In short, Israel today is as racist as Nazi Germany was and multi-culturalism is genocide.
The Hitler voice is very, very funny btw.
edited to add, synopsis of the plot.....
Hitler arrives from Argentina and announces that he is no longer a racist. He gets Israel to open up its borders in the interests of multiculturalism. The usual "leftists" are happy but Jewish people object and say that their culture is being undermined by intermarrying and miscegenation. At the end of the cartoon, the last Jew announces that there are no more Jews and that genocide has occurred, Hitler says "well who would have thought of that".
There are so many holes that it's hardly worth picking it to bits but the fact that there are large (and growing) Jewish communities in culturally and ethnically diverse societies like those in Western Europe and the United States shows that multiculturalism does not result in genocide.