Um Lior not quite. don’t guess halacha. the Rema says (source provided above) If an act has a rational toeles it is allowed. Giving gifts has a rational toeles. Of course others (Gr”a have stricter interpretations as to the prameters of Chukas akum, but you cant fault others for following basic Rema,)
BTw Religous Christians are opposed to gifts as it is a “commercialization” of their religious-holiday.