For example,
"When responding to the interviewer's question regarding Kwanza, the senator didn't say anything about Hannuka, therefore he must be an anti-Semite."
While Hannuka and Kwanza occur during similar times of the year and are both holidays, failure to include Hannuka in a discussion about Kwanza does not provide additional insight about the responder's stance on the unmentioned topic.
I want to say "Failure-to-mention fallacy" but that isn't a thing.