About the infidel thing, I think it actually means that your against the religion of whoever hates you. Thats why all those terorrists call everyone infidels, they arent of the same religion they are. Most of this nonsense is about religion. Thats stupid, not everyone else in America is Christian or whatever. I live in Canada and I'm as far away from religious as you can get. (I dont meen I'm some satanist, I'm just not religious)
And the THC thing, think of all the stuff they put in ciggarettes, tar, cyonide, all kinds of crap. Thats what causes the resporatory trouble. Given the choice between a clean joint or a cigarrette, I'd take the joint(I'm not a pothead)
Half the medicinal marijuana stuff making you feel better is all psycological.