salam,I want to you ask you it haram to touch a gay by greeting or sharing food etc?a friend of mine told me it is haram, a gay came to our store sake our hands if it is what we must do to repent to Allah sw,salam

All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger.

If it is surely known or predominantly thought by some indications according to the circumstances that the said man may find a desire by just shaking hands with men because of his unnatural tendency [i.e. perversion], then he should be prevented from this. However, if it is not surely known or predominantly thought that he finds this desire, then it is permissible to shake hands with him and eat with him if this does not cause any harm.

Nonetheless, one should take that opportunity to advise him and guide him to sincerely repent and remind him of the seriousness of this act.

For more benefit, please refer to Fataawa 89844, 88137 and 81381.

In case he does not take heed of the advice, then it is more appropriate to desert him if it is hoped that this is beneficial for him, but it might be that deserting him becomes an obligation if it is feared that he might drag the company he sits with to commit evil acts.

Allaah Knows best.