When God sent Moses to Pharaoh, He armed him with the demand "Let My people go, that they may serve Me." At one point Pharaoh was okay to let them go on his (Pharaoh's) own terms. One of the teachings here ... Israelites could not serve YHWH when service was regulated by any other master than YHWH. The way JWs follow and believe the WT teachings amount to idolatry.
One cannot serve 2 masters - God and the WT corporation.