You think stabbing people on trains is an accurate description of the behavior of Muslims as a religious group? If not, what is your point exactly? Prejudice against Muslims, or those perceived as Muslims, is often closely linked to racialised conceptions of them (see e.g. that adorable woman who thought that Obama was an ‘Arab’ back in the day). But anyway, if it’s not racism per se it’s just some other equally indefensible prejudice that we could well do without.