No, Russia spent many years under Islam.
It’s a part of their culture. Putin has been funding Islamic groups and financially promoting the expansion of Islam for years.
Another sound reason not to trust them.
Russia is made up of over 80 ethnicities. Many millions of muslims. Not much choice but to condemn Israel if they want to avoid another Chechnya. Other than that, I doubt the russkies care very much. About as much as the average American cares about Ukeland.
Orthodox Christianity is thriving in russia, so thinking they’re secret muslims is a bit of a stretch. Use facts, not slogans, if you want to make a coherent argument.