As a religious organisation, they are allowed to hire based on characteristics that you usually aren't allowed to discriminate with. They've repeatedly supported legislation that would allow them to refuse to hire LGBT people.

Across several countries, they've campaigned against the right for homosexual sex, marriages, inclusion in media.

They refused a $3.5m contract from the San Francisco city gov because it would've included giving the same domestic benefits to same-sex couples.

They said they'd leave New York if they were forced to offer the same domestic benefits to same-sex couples.

They campaigned against UK local councils including gay people in media like leaflets and the like.

High ups in The Salvation Army has said if you support gay rights you shouldn't donate to them.

They're extremely transphobic too, of course.

They did a bunch of child sexual abuse in Australia.

In the UK they own a lot of property that poor people stay in, and the conditions have been so bad that it was unlawful.

For the most part it's just that they're homophobic as fuck.

Probably things like homophobia.