Father Altman makes a clear distinction between politics and religion. They are not the same. However, the Catholic faith guides us on how to exercise our civic responsibility. Politics and religion intersect there.
His statement is quite strong, but Catholics who accept the Catechism in its entirety are thinking what he says. His YouTube video has 1.37 million views. I do not look for perfection in anyone. People with different views are in my affections, but truth must be told.