Avoid them
Your welcome.
My pleasure
Its all right
what is it and what can you do with wssyncmlnps
merry Christmas to you also
This is completely context dependent. "Likewise" basically means "the same to you." If someone says something polite to you, like "it was nice to meet you," then responding with "likewise" would be polite. If someone says something rude, then responding "likewise" would be equally rude. Tone is also important.
You can respond with a simple "Thank you for your sympathy" or "I appreciate your concern."
Yes well I think it is it's rude and disrespectful
You should say "Thank you" when someone says this to you.
Say "ola" back or "hi".
when someone says "rude much" it means that that they're to overly rude. its like saying wow, you've just crossed the boundaries with the rudeness