“Keep yourselves in the love of God” Jude 21 does not mean trying to keep God loving us but dwelling in, and growing, in the knowledge of His love for us.
Don’t try to love God more than you do just bask in His love for you.
Theology 101: If you can't imagine how your form of Christianity could possibly survive under socialism, communism, monarchy, imperialism, or dictatorship, it may not be Christianity.