We oppose Mormonism, its false doctrines, and publicly communicate such to others, because we love our fellow man as ourselves and wish others not to fall into the same sin as Mormonism projects upon its adherents.
Many in the LDS tend to substitute morality for fellowship with God through faith in Christ. The spiritual void is then shifted towards false spirits seeking counterfeit spiritual worship en lieu of worship of God through faith in Christ. At any time, if a human attempts to have fellowship with God the Father other than through God the Son, that person slips into unrighteousness and all unrighteousness is sin.
Until the believer returns to God through faith in the Son of God, Christ Jesus, he remains reprobate and there is no payment for his sin. but instead a fearful expectation of a fiery indignation from the Father. Attempts to distract that expectation by counterfeit substitution of humanly good works merely exasperates the condition of the sinner. Some might lapse into legalism and others might lapse into a frantic search for happiness in lasciviousness, such as observable in polygamist compounds where sexual deviants abuse multiple parties, ignoring reality by covering up the consequences with fraudulent multiple marriages.
Other LDS adherents might simply remain legalists, but their sins bare them out, frequently manifest by extreme vindictiveness and lust for power or murder of those who oppose them.
Scripture doesn’t teach tolerance of ungodly behavior or false doctrine, rather the believer in fellowship manifests love for his fellow man evidenced in its forbearance, patience, and endurance. The thinking of the believer in fellowship is not upon tolerance of sin, rather it is love for one’s fellow man as ourselves.
To those out of fellowship, observance of that patience might be confused with toleration of multiple paths to God, but that would be a mistaken understanding of Bible doctrine and of faith in the Son of God, Jesus Christ.
“We oppose Mormonism, its false doctrines, and publicly communicate such to others, because we love our fellow man as ourselves and wish others not to fall into the same sin as Mormonism projects upon its adherents.”
...meanwhile, Mormonism continues to prosper and grow. And no wonder! What you have is a marketing problem. You should say “Use Brand ‘X’” instead of saying “Don’t use Brand ‘M’”.
That’s what the Mormons do. Are they that much smarter than you?