Let's address some of the issues:
STD's - the talk about circumcision reducing infections primarily comes from studies done in Africa. The men that agreed to get circumcised were given condoms, extra instruction on how to use them properly and other tips for avoiding STD's. The men that did not get circumcised were given zero help. Naturally the cut guys had lower rates of infection. People in the medical field used this as "proof" but it was a flawed study from the beginning.
Hygiene - you don't really need to be cut in order to pull your foreskin back and clean your manhood. As long as you wash yourself like normal, it doesn't matter.
Sensation - if you've been circumcised since right after birth, you'll never really know what you're missing. The foreskin contains thousands of nerve endings that contribute to intense sensation. If you were circumcised and tend to really pound girls extra hard when smashing, hate wearing condoms and have a really strong preference for receiving oral from ladies...it's probably because your head is less sensitive and your require more stimulation to make up for it. However, since you were likely cut early in life, you don't know what you don't know.
Appearance - depends on the woman and what she's used to honestly. Some really care and some don't.
Religion - there's a theory that Jewish doctors in the United States (starting heavily in Texas according to some) started pushing circumcisions really hard right after World War II. Hitler and his dudes could identify a Jew just by looking at his circumcised peen. You might have a dude that's frontin' like he's a wannabe Nazi German. But if you were cut down there, Hitler's peoples knew you weren't one of them. By getting everyone circumcised, Jews couldn't be singled out anymore since everyone would be cut. In Europe, you could easily find Jews and Muslims based on that.