Best proof for a Christian is that there has been NO TEMPLE AND NO PLACE FOR sacrifice for about 2000 years.
The last sacrifice was Jesus on the cross, even though the people went through the motions of sacrifice for another 40 years.
God gave the people in the desert 40 years. When Christ died he gave Israel 40 years to change, then Titus destroyed their place of sacrifice.
Like I said to Greetings_Puny_Humans, we’ve both been waiting a long time, ey? Our real prophets have told us Jews that the service of our lips replaces the sacrifices (for now) and repentance can be done in an instant. Jews have laws for everything (even how to pee, as GPH points out sarcastically but truthfully, without being able to fathom the reasons, ever)
On repentance, the way for a Jew:
http://www.chabad.org/library/article_cdo/aid/911887/jewish/Teshuvah.htm