Agreed. Jesus is cited in three of the four gospels stating that remarriage after divorce (except for adultery or abandonment by an unbeliever) is in fact adultery.
I’m no fan of the Phelps family, but they have accurately cited Scripture. The Christian church in general is hypocritical in preaching so much against homosexuality, but glossing over the remarriage/adultery issue.
The Devil can quote Scripture as well.
Except....judge not lest ye be judged. The phelps clan are not sinless and will be judged the same as they judge....as you will.