Because that isn't the purpose of an unwavering ossified overly simplistic monolithic pre-fabricated trope referencing ideology wishing to preserve an antiquated status quo that is imperiled not just from a continous onslaught of ever newer pressures from without, but from its own rot within, ye olde "We, the Good Guys vs you Evil Bastards" trope?
Fear of 'the other' is THE spark that ignites and the fuel that sustains Conservatism. Without it, Conservatism wouldn't even exist to begin with, period.