When Joseph Smith was prophet, polygamy was commanded as it was when Abraham and others in the Bible practiced it so he was justified. And he stole no one’s wife. That is a lie. In fact at one point he told one man, I believe it was Heber C. Kimball, that he had been commanded to marry his wife to test his faith. When Kimball indicated he would obey that, Smith told him it was only a test of his faith and the Lord had not so commanded. So yes, at the time it was commanded it was holy practice. It no longer is.
Now that said—practice YOUR religion. Stop attacking the faith of others. If your own beliefs don’t allow you to practice your faith in an affirmative way, then I suggest you look into some other religion that does.