The Nakba is ongoing, and fulfills the definitions (a)-(d) in Article 2 of the 1948 Genocide Convention to the letter.
You can call it a "small" genocide if you want. But you won't get anywhere denying either the facts of what has been happening to the Palestinians, or their relation to genocidal acts as defined above.
Indeed! For instance, Kuwait Nabka'd about 400,000 Palestinians in the wake of the Gulf War. And Syria just Nakba'd another 300,000, with barrel bombs dropped from helicopters.