Also - that suicide bomber being Muslim thing is incorrect. Only certain populations of Muslims practice polygyny, typically what the media here would call 'fundamentalist' groups, or otherwise, orthodox. The large majority of suicide bombers come from 1) a nationality, not a sect of a religion and 2) a nationality that, historically and today, has been the most secular, ie. not fundamentalist, of Muslim nation groups. Palestinians do not allow polygyny, much like modern day Christians don't even though there is some textual approval of the practice in the Bible. So, how would the practice of polygyny to create 'surplus males' have any application on any cases of suicide bombing in Israel?
Sorta... my wife is from Malaysia, which is a very modern, moderate Islamic nation. The way it works there is not if you're fundamentalist you have more than one wife, it's if you have the money to support more than one wife. The Sultans of various states, for instance, all have more than one wife.
Ditto with many doctors, lawyers, and other well off individuals. My understanding is that the religion allows it, and cultural norms mitigate it, but the biggest factor is having the money to be able to afford multiple wives.