What Sibboleth said. Xenophobia is a right-wing value. Openness and internationalism are left-wing values. Period.
I consider myself as a progressive centre-leftist (even though some in your True Leftist ilk might consider me an evil neoliberal), I certainly have nothing but scorn for the reactionary right and their associated racist/crass nationalist/xenophobic penchants and I think that those who think Nazis are lefties are retarded idiots who should read a book; but what you said is utterly ridiculous and hackish to the nth degree. I know that the left loves to treat all right-wingers as intolerant, uneducated, racist, xenophobic regressive morons - and while some (way too much) are, to brand them all as such is just stupid and ridiculously hackish. You can defend your ideological perspective without turning into a hack who says these kinds of ridiculous things. Come on, admitting that some on the left can be xenophobic too isn't akin to treason to some broader True Leftist cause. Similarly, the left certainly doesn't have the monopoly on openness and internationalism. Plenty of centrists, liberals and right-wingers can be considered internationalist, a bunch can be considered "open" whatever that means. Again, why can't you just adopt an open mind? Not all those who disagree with your views are horrible people. Not all those who don't fit in with your definition of the left is some fascist right-winger.
Right-wingers love to bring up Stalin as some xenophobic left-winger, and while nobody can argue that he was a racist etc scumbag he wasn't a left-winger. But need I bring up, for further examples, Georges Marchais and the PCF's crass attempt at race baiting in the 1980s? For another example, in the Rand Rebellion in 1921-1922, the SALP - which was clearly a socialist party - used the slogan "workers of the world unite, and fight for a white South Africa". You could, arguably, redefine being left-wing to exclude all these kind of folks, but that's just stupid. The "left" is broader, much broader, then what you envision it to be.
Please, open your mind. The world isn't black and white, for Christ's sake, and politics is more complex than "my side = good" and "the other side = evil fascists".