Well Jimmie you should have accepted those comments even if they were negative. It would give you the opportunity to reply and inform and educate the ignorant and prejudiced. You could state that the nation was built on immigrants, and without them the USA wouldn't exist. You could have said that it was a testament to freedom and tolerance, and Obama is a product of the declaration and constitution of the United States of America.
Unfortunately, for all your good intentions, when you write about politicians or presidents you will polarise opinion, and consequently you will swim in shark infested waters.
I looked at your Squidoo lens, and found it inoffensive and harmless - I'm not too happy that a third party promoted it on Wizzley, for all it's innocence and naivety it will attract undesirable elements, particularly in the build up to a presidential election - but you've created it now.
Obama is a divisive figure in the US, so even if you make a Squidoo Lens about Obama Cupcakes or Barak Blueberry Pies you can expect a flurry of comments. They won't be looking at the contents - they will be looking at the name and you have inadvertently politicized your lens.
There's alot of that going on at Squidoo. I suspect that the Wizzley bods will learn from that.