That's just rude and false. Perhaps a refresher from Martin Luther's small catechism.
The Eighth Commandment
Thou shalt not bear false witness against thy neighbor.
What does this mean?
We should fear and love God that we may not deceitfully belie, betray, slander, or defame our neighbor, but defend him, [think and] speak well of him, and put the best construction on everything.
And who is my neighbor?