Mfs1 - what ideology are you referring to, specifically?
If it's Islam, I really have to challenge your generalization. This has nothing to do with being PC. It's about an inaccurate and incomplete stereotype of who is doing what to whom.
Did the shooter use bits and pieces of Islamic religious thought to rationalize his evil? Probably - though the only direct evidence I know of is his statement of allegiance to Muslim terrorist groups. I also have read that he expressed loyalty to groups that actually oppose each other philosophically, so I tend to question his grasp of both his own religion and the politics of Middle Eastern terrorists. This is why I find the stereotype inaccurate.
I also find the reference terribly incomplete because you seem to be ignoring the fact that, over time, at least as many homosexuals have been abused and slaughtered in the name of Jesus as Allah.
They, too, cherrypick bits and pieces of Christian thought to justify themselves. And no, these murders are not just buried in the distant past - there are Christian clergy actively preaching today that Christians greatly please God by killing "the abominations", both here and abroad.
The firebombing of the Upstairs Lounge in 1973 is a case in point. The perpetrator was never caught, so we cannot know how the SOB rationalized the act - but I'm fairly sure there wasn't a Muslim in sight. Given the heavily Christianized culture of the US, it's also a pretty fair bet that s/he would identify as Christian.
32 people were burned alive in that attack. One article I checked reports that churches - Christian churches - refused to bury the victims. The article also reports a popular joke that made the rounds about burying the queers in fruit jars. Sorry, but Muslims do not have a corner on hate.
So, if it's Islamic thought you're naming as an ideology of hate, then the same name has to be applied to Christianity.
It's kind of a chicken or egg question: does the religion cause the hate ... or is the religion being used as political cover for the underlying hate and lust for dominance?
I think it's important and valuable to look at just how foreign terrorists are able to radicalize American citizens here at home, born and raised with all the rights and benefits of being born here. I certainly agree that religiously based terrorism played a big part in the Orlando crime. I do not agree that the religion of Islam caused the murders.
I think that a real root cause analysis would show a perfect storm of homophobia, a dysfunctional and abusive personality, a closet case's psychotic projection of his own self hate and easy access to lethal technology, all of it kicked into overdrive by a misused and poorly understood religion.
This post is probably too long. Sorry.