Allah will support the just state even if it is led by unbelievers, but Allah will not support the oppressive state even if it is led by believers
Consider Social Security. The young have always contributed to the support of the old. Earlier, the young helped their own parents out of a sense of love and duty. They now contribute to the support of someone else's parents out of compulsion and fear. The voluntary transfers strengthened the bonds of the family; the compulsory transfers weaken those bonds.