It's just very hard to find a compromise or "agree to disagree" when the topic of debate is something like should LGBT people be allowed to exist. The days are long past where the right/left divide was all about economic policy -- the divide lies along basic human values at this point. You're going to be hard pressed to find people who can engage with you calmly when you're defending a party whose primary concerns right now are stripping away civil rights from their least favorite human beings before all else.