Hi! My DH was also on the circ bandwagon during the pregnancy until we were lucky enough to get the true information on it from our OB and our doulas. We watched many youtube videos, researched on websites and spent a lot of time discussing the issue. In the end, my DH changed his mind...so just know it can be done!
As to boys making fun of him. I am sure you have heard that circumcision rates are on the decline in the States. This may sound sort of abstract if you aren't seeing it. I can tell you that I worked in a daycare center in college for about 2 years off and on, and it IS true. About half of the boys were intact (lucky them!). I can assure you that there were no comments made or making fun of other boys for the way their penis looked. The kids were mostly focused on the differences between little boys and little girls. As he gets older, if other boys are making fun of his penis (which I sincerely doubt), I would just make sure you have prepared him with a repertoire of witty comebacks (perhaps focusing on why other boys are staring at and worrying about his penis!)
As to changing his mind. I am not sure how your hospital or pediatrician works, but where I delivered and in my original pediatrician's office, circumcision was not performed without the mother's signed consent (I don't think this is the case everywhere, but I would check). The bottom line is that it is your job to protect your son. These reasons your husband are giving for circ'ing your son are not compelling and have been disputed by many different sources. This may sound trite, but if your DH was deadset on tattooing your DS or piercing his ears right after birth, would you feel compelled that you had to change his mind? No, because no one would agree that doing these things would be acceptable. It is just sad that in our society, a boy's genital integrity is not as protected as it should be.
Please, please, please for your son's sake. Look around this forum and to other resources on the net and get the true information on circumcision to pass on to your husband. Make him watch the graphic videos. Your son will thank you for respecting his bodily integrity when he gets older, and if he should make the choice to circumcise when he is older, at least you know you left that choice to him. There is no reason anyone else should be making decisions about altering the natural and healthy state of your son's genitals.
Good luck and just know there are a lot of us here to support you!