I'm unaware of any evidence that this man has been the victim of hate crime, except his own assertion of such. Is there a police statement to back this up?
I do not support hate crime but I do support the right to speak out against the campaigns by the RC church to prevent legal abortion for those who need it - even victims of rape and incest - and their desire to reverse marriage equality and the damage that would do. If you hold abhorrent views and try to foist them on others then you have to expect to find that society does not much care for what you stand for.
And it's not 'mainstream' to support abortion rights and marriage equality, as if this man is taking some courageous stand against liking the X Factor or Pizza Hut. It is still risky to be openly gay. We still judge women for abortion - it's still taboo to talk about having one. It's not 'mainstream', it's humane to want a society that allows both, its humane and compassionate. It's no surprise that Catholicism fails drastically in this regard, but then its made-up god of guilt and vengeance is created in its image.
I think you misread the article. Robertson did not say he was the victim of hate. The article seems to be saying that stuff Robertson says is mis-labelled as "hate" by certain people who presumably self-identify as secularists, in order to silence him from voicing his opinions. And the article seems to be saying this happens to other Catholics, expressing their views on various matters.
So for example, despite attacks on Muslims and mosques, he would object to people who try to silence his opinion of Islam e.g. in the article below by labelling him Islamaphobic or someone who hates Muslims.
http://www.express.co.uk/news/uk/568999/Free-Church-minister-sounds-alarm-over-rise-of-IslamThe article says
"At least, though, you could still have a debate about these things in the old Labour Party. Those who supported a woman’s right to choose to abort her baby might disagree intensely with your pro-life sentiments but they would appreciate the sincerity of your position. In modern Scotland though, which strives to be the world’s most enlightened and inclusive wee country there is a campaign afoot to shut down all debate on those issues which Scotland’s social Sanhedrin considers sacrosanct and beyond dispute.
Thus, if you sincerely believe that a human life in the womb is deserving of as much protection as any other human life you are considered an extremist and obviously (if you are male) a sexist who is guilty of crimes against feminism."
I won't copy and paste any more - as the rest of it is right there in the link.
So it seems the main point of the article is an objection to shutting down of debate. Given there will be hate crimes sometimes committed on gays, women, Muslims etc are some people saying it is ok to shut down debate on sincerely held positions? This is a recurring theme - and seems to have played a part in voting for Brexit and Trump. I think the article has a valid point about the danger of shutting down debate by mis-labelling some views as "hate".