BSD and GPL have a *very* different spirit. The first one is strongly academic (making the source available with no strings attached, just requiring the user to give credits where they're due), the latter is strongly political (anti-proprietary, and openly communistic since it aims to abolish private property as far as software is concerned).
sigh. Well, there's the old "the GPL is communism" troll.
The GPL doesn't abolish private property as far as software is concerned. That statement is wrong on so many levels, and demonstrates so little understanding, that it is difficult to know where to begin.
First of all, copyrights are not property. Copyright is a monopoly right granted by government securing to the owner of the copyright certain rights to prevent the copying of a work except where permitted by copyright law. You may or may not agree that this is a good system. It is not, however, property except by a strained analogy. Copyright lacks characteristics of true property.
Secondly, the GPL does not undermine copyright. It DEPENDS on copyright in order to work. What the GPL does is to allow those who have donated their time and effort to the public good to assure that their product remains a public good, and that those who use their code and distribute the result must in turn distribute the code. It simply requires payment, not in money, but in kind. It doesn't even require you to relinquish ownership. It just requires you to distribute your source.
This is not communism. Communism is a system whereby a self-proclaimed elite takes over the mechanism of the state and imposes state socialism. The GPL is, if anything, a libertarian approach. It is certainly not a state socialist approach.
I don't know about Sam Greenblatt, but the fact that you can't get rid of BSD makes most professional developers very happy.
I presume that you mean lazy professional developers who want to pillage public domain code for their proprietary closed-source product and sell it back to the public, as opposed to ethical professional developers who will give back as it has been given to them, or else avoid using GPL code. Which kind are you?