It just strikes me as very curious that someone researching this very subject should be so dismissive of signs of solidarity between Copts and Muslims and so keen to paint the situation as hopeless.
I wouldn't know whether the situation is hopeless or not but it is grim.
I remember once seeing news footage from the earliest days of the Iranian revolution. Islamists weren't the only ones wanting to get rid of the Shah, there were political progressives and secularists of various kinds too.
The footage showed a march of people only identified as 'progressives' many thousands strong. Then they came under attack from a much smaller group of Islamist fanatics, all young men, who hurled stones and debris at them with amazing vigour.
The progressives didn't fight back but instead shrank from the fierce barrage - the long camera shots made the march look like a huge caterpillar squirming helplessly under countless pin-pricks. We all know how that turned out in the long run.
I don't think you can rule out something like that happening to those Egyptian Muslims who have shown solidarity with Copts.