No there's more to it than that. The issue isn't left-presence. It's left-presence that creates any effective political funnel from liberal to leftist.

They're pretending to tolerate all the other spaces because none of them are lib-converters like CTH was when it was blasting off. MTC got the chop too because it was acting as a funnel from CTH into ML. Lib > CTH > MTC was the full pipeline that they killed.