I'm having a hard time understanding why someone with HIV or a disability would still be excluded. The US has pretty strong protections for people with disabili

I'm having a hard time understanding why someone with HIV or a disability would still be excluded. The US has pretty strong protections for people with disabilities, which makes me feel like we're supposed to honor and include those people. I wonder what the logic is that prevented us from extending that philosophy to immigrants. HIV is also more of a chronic condition as apposed to a public health hazard these days. It's cost of perpetual treatment isn't significantly different from dozens of other conditions or diseases, and the risk to the public is similar to other diseases like Hepatitis. Anyone have insight that I'm not understanding? -- Edit: elliekelly gave a well-thought out reply below that makes logical sense, even if I disagree with the policy