Offence cannot be given, only taken.

I somehow seriously doubt that, in fact, I have seen that comment frequently on other social media, and usually by those who suggested such on that same media who were actually the most thin-skinned I can recall

It was essentially a fairly inane comment used as one way defence by those wishing to abuse without taking  responsibility, and often to promote themselves 'commercially'. and little to do with 'principles'

The Bible, least the OT has numerous passages some of which if taken literally and acted upon might lead to a potential prosecution. 

Those holding such views are free to hold them, but not necessarily entirely free to promote them in all circumstances in the manner in which they choose. Same with laws on racial hatred and aggravated offences.

Milo like Hopkins is there to promote themselves on any available platform currently likely to elevate him

Same it seems with Breitbart former chief Bannon, the website was home to what he called the alt right including KKK, White Supremacist and neo-Nazis among others,yet Bannon  in conversation said  earlier this week said such groups  should be 'stamped on' hard, and that they were 'losers' and 'clowns'

In other words they were used by him as a means to an end, nothing more

In his defence, his assessment on NK was probably far more sane than that of his boss