Of course it would be.
>> I believe it would be impossible to be a true, genuine, sincere Christian, and antisemitic at the same time.
It is tough for a Bible-believing Christian to be an anti-Semite after reading Romans 11; Paul lays it out clearly there.
“...if the root is holy, so are the branches. If some of the branches have been broken off, and you, though a wild olive shoot, have been grafted in among the others and now share in the nourishing sap from the olive root, do not consider yourself to be superior to those other branches. If you do, consider this: You do not support the root, but the root supports you...”