When the church made their decision that birth control was intrinsically evil aids did not exist. - Birth control is not an intrinsic evil,some methods are allowed including NFP and (temporary for married couples) abstinence (100 % effective). ARTIFICIAL birth control is the distinction you mean.
You changed the subject within the sentence to AIDS (from artificial birth control - ABC).
Regarding the latter, ABC, the Church speaks to even married heterosexual couples who are living a sacrament and are not sinning by having intercourse with one another. Even then it is a sin to use them. Intercourse between non-married people, a married person and not-their-spouse and vice-versa; and any combination of sexual anomalies further out than that are sinful (mortal sinful as per gravity of the sin) of themselves with or without ABCs.
AIDS could inflict an innocent party or a person in a sacramental marriage. Even in that rare case don’t look for the Church to go issuing a condom dispensation. An infected person having intercourse with a non-infected partner – and rationalizing that wearing a condom is “safe sex” – is deluded. Condoms fail one time in five due to people using them wrong, other defects, the infinitesimally small size of some organisms, etc.
So within a month of regular sex, the uninfected partner may be a new victim.
Unfortunately by the time aids came out, the church couldn’t go back on their decision. AIDS might have been around before, but in the '80s it became a sensational disease - and due to a high percentage of homosexual males that got it (and the disease might possibly have originated from related practice of same) it was considered a “gay” disease - although others got it through blood transfusions and other biological contact with infected people.
The Church does love everyone and has hospitals to help people, and does teach moral and licit lessons concerning health and disease prevention. It would never and will never sanction condoms as “safe homosexual sex” even between non-infected partners because the intrinsic evil IS the homosexual sex. Same goes for condoms and heterosexual sex.
Africa is being ravaged by the aids epidemic and preaching abstinence and condoms are evil don’t exactly help. Abstinence would be 100% effective in disease control and in line with Church teaching. It WOULD help if followed - especially where the sexual acts were sinful ones. Condoms, being inanimate objects, are not evil - but the idea that using them makes sinful sex good, is.
Probably you’re thinking " … people will do this anyway … and I don’t want them to die … and condoms might make things a little bit safer than using nothing at all even if they are risky…" and conclude "so charitably the Church should allow them, promote them, give them away ‘’ something more MODERN and SENSIBLE! But the Church is to keep her children from going to hell, and to teach God’s holy ways regarding sex.
If aids was around before condoms came out the church’s stance on birth control would be different.