No it's really not. I'm not sure where you'd even get an idea like that.
Zionism is best thought of as an expression of 19th century European ethnic nationalism
BEST thought of? You mean it's best for those who have an interest in discrediting it I assume?
Zionism is like any other form of ethnic nationalism in that trying to minimize any identity down to a single phrase will seldom give you much information of educational value. Most states are formed of ethnic nations. I'm not sure why you seem to consider this a slight.