The greater issue is their racism (it is racism). What is it to them if a couple is mixed? Why should it make their "blood boil"?They are against lifestyles being pushed on the public, every stinking day. advertisement showing agendas instead of products
It is not contrary to Scripture. The reason we find for races in Scripture is related to location (the one reference being the "black is beautiful" passage). Languages were confused so that people would populate the earth. Israel was not to mix with pagans (intermarry). None of this has anything to do with the racism of these government officials.
When a government official expresses his or her racist ideas while in office (regardless of race) I think it appropriate they step down because they represent people of these racises and interracial couples.
What makes my "blood boil" is not interracial couples or even people who do not like it. What does it for me is "Christian" pastors who exchange the gospel of Christ for proclaiming their personal preferences as if it were biblical authority.