I assumed he was more bothered by people starting fires and destroying art in his home city than anything else.
Direct your complaints to the LGBTQ lobby for hijacking a Christian symbol.
Why can the two not coexist? It's rather a symbol of hope and new life - it seems entirely appropriate for the two groups of people to co-exist. From what I know, it's not uncommon for homosexual people to also be Christians - the two are not incompatible, despite what some people might think.
But of course, that's not what most people associate a rainbow with today." It has been co-opted by "the homosexual movement".
See, again, people thinking first and foremost of homosexuality rather than hope.
Some might say that the symbol of the rainbow is also a sign from God that he'll be a bit more tolerant in future, given his general intolerant nature in the Old Testament.