My thought, too.
Muslims and leftists have been working as close allies for some time, even though they would see to have very different views about such things as the rights of women and gays.
Another analogy would be Communists and Nazis. Hitler and Stalin worked together very happily, dividing up Poland. It was only when they had eliminated their other rivals that they fell out with each other.
Presumably the same would be true of the Muslims and the leftists. They’ll continue to work together until they think they see victory within reach. Then they’ll turn on each other for final dominance.
Their views align closely. Both are for rigid state control over the common people.
In the West, the left campaigns for women and gays, because in doing so they increase the power of the government via anti-discrimination enforcement. But they are silent about the treatment of women and gays in Islamic countries because speaking out would not result in an increase of government power.