I agree with you on this incident. Unnecessary, uncalled for and cowardly.
If your side could concede that the multiplicity of 'horrible' attacks in the name of Islam were as bad (or in most cases far worse) we might get somewhere.
Instead, you get idiots like fanny5 trying to balance the scales of justice by putting forward the Finsbury Park mosque incident as some sort of equaliser against Israeli Embassy/Balfour House, 7/7, London Bridge stabbings, Glasgow Airport, Liverpool Women's Hospital, Stephen Timms, Westminster Bridge car attack, Parsons Green tube, Lee Rigby beheading, Palace Of Westminster, Manchester Victoria, Manchester Arena, Whitemoor Prison, Streatham, Reading, David Amess....... need I go on? There are at least 20 which were foiled by the authorities.
When you see it in black and white, doesn't it provide a 'wake up and smell the coffee' moment?
I suppose you'd rather highlight a damaged wall being rebuilt by a few whiteys?