There are so many warnings about false teaching. There really is NO reason to tolerate it. The first instruction ever given to the church is in Matthew 18, to discipline unrepentant church-going sinners! Jesus taught much against the dangers of false teaching, using vivid language of ravenous wolves shredding the sheep. Paul warning of unaddressed sin spreading like gangrene. Peter warned of satan roaming the earth looking for someone to devour. The letters to the churches in Revelation were written well after all the previous epistles. The Thyatirans should have known better.
We should always be pursuing holiness, and tolerating sin is the opposite of slaying sin. It is a massive failure.
In Thyatira’s case, not only had they tolerated a false prophetess who was usurping a place of leadership, but she had been doing it unabated for so long that she had spawned a second generation of like-minded idolater usurpers.