This has long been an allegation from the left of politics, used to prevent conservatives from presenting arguments.
Conservatives attempt to bring logic to a discussion, only to be shouted down by cries of 'racism'. Just about anything can be so labelled. This is especially true when dealing with the subject of Islam, where the left has lost the battle of data, and hopes to defeat facts with emotion.
Racism manifests itself in two ways, via prejudice (thought), and by discrimination (action).
The totalitarian left can freely argue that conservatives think racist thoughts, since prejudice can be neither proved nor disproved. That is, the totalitarian left not only claims to judge people's actions, but raises itself to a high moral ground by claiming to know the thoughts of others, ie they feel that they are now equal to God. There is no logic here, just emotion, and unfortunately it sometimes succeeds.
The totalitarian left also claims that attacks on Islam are racist. They know that people can change their religion, but not their race. It is blindingly obvious that Islam is not a race, and criticism of Islam cannot be racism. They don't care, as long as this wins the argument.
In Western society a man's thoughts are his own. The totalitarian left does not accept this, as they can decide what thoughts are permitted. It is gross hypocrisy to label as racist those who criticise Islam.
Discrimination too can be legitimate. In Japan, Korea, the Philippines, China and many other countries, no Westerner can own land, and it is virtually impossible in some countries for westerners to gain citizenship.
This is blatant discrimination, but quite legitimate, good and healthy, since they value and protect their own cultures, and do not want it to be watered down by multiculturalism. They see the West as committing suicide by allowing huge numbers of immigrants who do not hold Western values and have no intention of integrating.
Some years ago the big moral issues were things like cohabitation, contraception, and unnatural practices like sodomy. Today these evils are somewhat normalised and a new religion and new evils have been invented to take their place, such as racism and sexism, which are in fact not evils at all.
True racism exists today, along with slavery. In the Islamic world, almost no Jews are left in North Africa and the Middle East outside Israel (there are millions of Muslims inside Israel). Before Islam, many Jews lived in these countries. They have been killed or driven out. This process is now happening with non-Arab Christians.
Dr Bill Warner on Jew Hatred
Also in North Africa, blacks have been targeted for slavery. The Arabic word for 'slave' is'abd'. The same word is used for 'black'.
In The Name Of Allah - Abd/ Black Slave
Unfortunately bishops and priests around the world have swallowed whole the social justice agenda, and have pronounced racism, sexism and the evils of conservatism to be the great issues facing society. Their true business lies elsewhere, in the areas of faith and morals, but concentration on the hobby horses of the left enables them to share the high moral ground. Faith and morals they leave to others.