There's no doubt here. That is a clear intent to commit a criminal offence.
Read The Public Order Act 1986 Sections 4 & 5. They're pretty easy to understand . . . even by somone who thinks abuse is an acceptable response
4 Fear or provocation of violence.
(1)A person is guilty of an offence if he.
(a)uses towards another person threatening, abusive or insulting words or behaviour, or.
(b)distributes or displays to another person any writing, sign or other visible representation which is threatening, abusive or insulting,.
with intent to cause that person to believe that immediate unlawful violence will be used against him or another by any person, or to provoke the immediate use of unlawful violence by that person or another, or whereby that person is likely to believe that such violence will be used or it is likely that such violence will be provoked.
(2)An offence under this section may be committed in a public or a private place, except that no offence is committed where the words or behaviour are used, or the writing, sign or other visible representation is distributed or displayed, by a person inside a dwelling and the other person is also inside that or another dwelling..
(3)A constable may arrest without warrant anyone he reasonably suspects is committing an offence under this section..
(4)A person guilty of an offence under this section is liable on summary conviction to imprisonment for a term not exceeding 6 months or a fine not exceeding level 5 on the standard scale or both.
5 Harassment, alarm or distress.
(1)A person is guilty of an offence if he.
(a)uses threatening, abusive or insulting words or behaviour, or disorderly behaviour, or.
(b)displays any writing, sign or other visible representation which is threatening, abusive or insulting,.
within the hearing or sight of a person likely to be caused harassment, alarm or distress thereby.
(2)An offence under this section may be committed in a public or a private place, except that no offence is committed where the words or behaviour are used, or the writing, sign or other visible representation is displayed, by a person inside a dwelling and the other person is also inside that or another dwelling..
(3)It is a defence for the accused to prove.
(a)that he had no reason to believe that there was any person within hearing or sight who was likely to be caused harassment, alarm or distress, or.
(b)that he was inside a dwelling and had no reason to believe that the words or behaviour used, or the writing, sign or other visible representation displayed, would be heard or seen by a person outside that or any other dwelling, or.
(c)that his conduct was reasonable..
(4)A constable may arrest a person without warrant if.
(a)he engages in offensive conduct which [F1a] constable warns him to stop, and.
(b)he engages in further offensive conduct immediately or shortly after the warning..
(5)In subsection (4) offensive conduct means conduct the constable reasonably suspects to constitute an offence under this section, and the conduct mentioned in paragraph (a) and the further conduct need not be of the same nature..
(6)A person guilty of an offence under this section is liable on summary conviction to a fine not exceeding level 3 on the standard scale.