Can a Muslim accept a gift from his kaafir brother?

He found a kaafir on the road – can he give him a ride?

Benefitting from what the kaafirs have

She is boycotting American goods – should she leave the institute because it teaches American material?

Muslim and non-Muslim woman visiting one another

Making friends with a kaafir woman

Is it prescribed to boycott innovators in this day and age?

Giving blood to a kaafir who is not hostile towards Islam and who is not in a state of war with us

Ruling on sponsored students staying in kaafir countries

Ruling on seeking and accepting help from the kuffaar