The Lord counsels us not to be prejudiced against any people of the house of Israel.

3 Nephi 29:8–9

8 Yea, and ye need not any longer hiss, nor spurn, nor make game of the Jews, nor any of the remnant of the house of Israel; for behold, the Lord remembereth his covenant unto them, and he will do unto them according to that which he hath sworn.
9 Therefore ye need not suppose that ye can turn the right hand of the Lord unto the left, that he may not execute judgment unto the fulfilling of the covenant which he hath made unto the house of Israel.

President George Q. Cannon said:

“At no time should we do anything that can be avoided which would chagrin, inconvenience, or pain our fellowmen, and no word or sentence should ever pass our lips, even in a joke, which will not bear the strictest scrutiny under the searchlight of truth. If our surplus energy must find vent in some way, let it be utilized in providing surprises in the shape of blessings for the widows and the fatherless or in doing something that will contribute to the happiness and well-being of our fellowmen.”

(Gospel Truth: Discourses and Writings of George Q. Cannon, comp. Jerreld L. Newquist, 2 vols. in 1 [1987], 452.)