I'm sure they'll style it a social democrat, but almost certainly yes. May well be Swinney as caretaker until contest is done even. I wouldn't be surprised to see Kate Forbes take over, then ask Holyrood for an early election to see if she get a mandate. We just had a Muslim, so I can't see her Christianity interfering - and she's likely to lead a minority government anyway
Humza was very explicit in wanting to continue with the progressive slanted agenda. Forbes can't even commit to sounding like a centrist. She absolutely will lead with her right wing interpretation of Christianity.
Humza has resigned. The party will now decide. With plenty of conservatives (small c) in Alba, and the more radical left in SGP, whoever wins will be the moderate of the party - whatever that looks like. My money is on her saying her more fundamentalist views will be whip free and up to each MSP