More often than not I actually made fun of the Nazis. I didn't take them seriously. I considered them funny little brown delinquents, more comic than dangerous. And that was a mistake too many of us made. Focusing mainly on their repulsive and obnoxious qualities, we failed to sense how dangerous the Nazis really were. –Voices from the Third Reich,
Johannes Steinhoff et al., 1994

What does the author mean when she says they "failed to sense how dangerous the Nazis really were”?

Some Jews believed the Nazis would be more tolerant of non-Aryans eventually.
Some Jews did not fear the Nazis because most Germans did not support the party.
Some Jews thought they could escape to other countries before they were arrested.
Some Jews were not expecting Nazi
anti-Semitism to take such a violent turn.