I can understand your frustration. I currently feel that way towards a certain political party, but I have to keep an open mind because things change.
For example, I don't doubt what you said Democrats was true in past decades, but today I believe the Democrats are more friendly towards LGBT rights than Republicans are. It appears things have changed on those specific issues.
Maybe we wont agree, but let's at lets at least find clarity: Do you believe Republicans or Democrats are currently more friendly towards LGBT people?