Complete BS. Muslims make only half of Kazakhstan population. I am afraid that author counts as Christian the converts to his Protestant sect. And probably most of them are lapse Christians from traditional churches.
There are 6 million of Orthodox Christians and more than 300,000 of Catholics. Just the number of Poles who are Catholic is above 100,000!
I was deployed to Uzbekistan, visited a Catholic church in Samarkand, saw a large Orthodox church. Uzbeks proudly informed me they practiced a tolerant form of Islam [Sufism] or didn't practice at all.
There were more than zero Christians in Uzbekistan in 1990 (though seventy years of communism didn't help).
And this Crusades guilt-walk? Gimme a break.
It is interesting to me that the Orthodox are often not counted, and the Catholic under counted.
By tradition the Kazaks are Sunni Muslims of the Hanafi school, and the Russians are Russian Orthodox. In 1994, some 47 percent of the population was Muslim, 44 percent was Russian Orthodox, and 2 percent was Protestant, mainly Baptist. Some Jews, Catholics, and Pentacostalists also live in Kazakstan; a Roman Catholic diocese was established in 1991. As elsewhere in the newly independent Central Asian states, the subject of Islam's role in everyday life, and especially in politics, is a delicate one in Kazakstan.
http://www.photius.com/countries/kazakhstan/society/kazakhstan_society_religion.html
The vast majority of today's Kyrgyz are Muslims of the Sunni (see Glossary) branch, but Islam came late and fairly superficially to the area. Kyrgyz Muslims generally practice their religion in a specific way influenced by earlier tribal customs. The practice of Islam also differs in the northern and southern regions of the country. Kyrgyzstan remained a secular state after the fall of communism, which had only superficial influence on religious practice when Kyrgyzstan was a Soviet republic. Most of the Russian population of Kyrgyzstan is atheist or Russian Orthodox. The Uzbeks, who make up 12.9 percent of the population, are generally Sunni Muslims.
http://www.photius.com/countries/kyrgyzstan/society/kyrgyzstan_society_religion.html