My question is about the use of the form "beheads" in the following sentence from Victor Davis Hanson's essay "Are the Orcs Winning?":
In contrast, Hamas only drives Christians out of Gaza rather than beheads them.
The form "beheads" sounds wrong to me; I would have said "rather than behead them." Now, I don't doubt that Dr. Hanson wrote it correctly; I'm sure he knows much more about language and grammar than I do. My question is, is "behead" also acceptable here? If so, is it a matter of formal vs. colloquial, or British vs. American usage, or what? Also, what would have been a better heading for this question? Is the form without "-s" an infinitive, or a subjunctive, or what?