Is Washington National Cathedral evil for supporting Capital Pride march?

Yes, Washington National Cathedral is evil for supporting Capital Pride march to advance homosexuality in society:

March in Capital Pride Parade

God of the Holy Bible hates homosexuals as is clear from Romans 1 and what God did to people in Sodom and Gomorrah because of rampant homosexuality.

For Washington National Cathedral to support pro-gay activity is absolutely wrong in the sight of God of the Holy Bible.

Churches that participate in gay pride marches must be seen as advancing the power of Satan on earth.