There's just something... I get suspicious when we're used, however innocuous it may be, to help someone's argument against Muslims. It makes me feel as if we're being flattered for cynical ends. As a community, and more so on an individual basis, we are incredibly susceptible to flattery and praise, which occasionally leads us to undertaking ill advised action, or at least adopting certain unhelpful attitudes. Yet I do think it's important the stark distinction between Sikh and Muslim must be made to the wider public, especially to the average person who assumes a beard and a covered head denote the same ideology.
Islamic apologists amongst Sikhs, and some Muslims, will always cite the "divide and conquer" mantra, which is laughable in itself due to the mistaken belief that we as two distinct faith groups were ever unified, but to my mind that's another symptom of an interesting issue that's been brought into sharp focus since the Manchester attack whereby it's clear that Muslims (and some traitorous Sikhs) cannot bear to see Sikhs illuminated in a positive light in mainstream society, especially if it serves to highlight the contrast between our two religions and their respective people.
Be very, very wary of those who are quick to decry Sikhs for daring to differentiate themselves from Islam and Muslims. More often than not such behaviour is rooted in a devious enviousness and downright maliciousness. The unspoken subtext on the part of Muslims for not wanting us to be viewed positively is, "If we're being made to look bad, why are Sikhs being singled out for praise? They should be made to suffer for Muslim devilry." That's the mindset we're dealing with here; a vindictive, warped, and malicious desire to see Sikhs tarred with the same brush as them. Don't fall for their games.