Russian Jewish immigrants "seeking renewed contact with their Jewish heritage" 

 The influx of refugees, many of them seeking renewed contact with their Jewish heritage, has led to a renaissance of Jewish life on German soil. 

Although this sounds very nice, this is just wishfull-thinking and a lack of knowlegde of the reallity of the russian-jewish german immigration.

To further explain my point, I'll use a bit from the Germany Talk page:

..., that during the last years more Jews prefered emigrating to Germany than to Israel as they, usually Ashkenazies, feel much closer to Germany and the German language (Yiddish is a Germanic language) than to Israel. The Hebrew language is too much different from Yiddish and Israel is a Mideast nation in a conflictive area, so an increasing number of Ashkenazies prefer emigrating to Germany where they feel more integrated

These kind of comments and insights are simply not true, are totally away from reality and show a profound lack of knowledge of current german/jewish life.

Good and reputable sources on this matter are abundant. I would suggest that you first start by readind the "Juedische Allgemeine" Germany's (internationally aclaimed) leading daily newspapers devoted to the jewish community. You'll find there lots of insights, analysis, studies, newsreports, and this will help you a lot to understand the reality of the Russian-Jewish post 90's emigration to Germany. Furthermore the german government policies, decisions and the impacto on german society have also been thouroughly  described, analysed and commentated on the main media press (Spiegel, etc) easly. 

more Jews prefered emigrating to Germany than to Israel or feel much closer to Germany

The reason number one for this preference is the exceptionally conditions (read money) that this german post-berlin-wall policy entitles them to. (much to the critic of the Israeli Governement)

Most of Russian who came, would never have left the ex Soviet Union, if it wasnt for this special german policy and the catastrophic collapse of pensions and social security in Russia. Not to Israel, not to anywhere. So it is incorrect to say "preferred". They just grabbed the opportunity. They neither feel closer to Germany nor to Israel. They feel and will continue to feel close to Russia, were they have already spent 2 thirds of their lives.

 Israel is a Mideast nation in a conflictive area 

Most of the young, connected to Judaism, educated Russian Jews, have indeed by enlarge emigrated to Israel, Canada or the US. This started happening in the 1970s and peaked in the 90s
 

 feel much closer to... German language (Yiddish is a Germanic language) 
again this is nonsense, as the vast majority of these people have never spoke yiddish. They spoke Russian and are connected to the russian culture.

 " ...a renaissance of Jewish life on German soil " and Chabad Lubavitch 

 ... Chabad-Lubavitch ..opened this ...Chabad-Lubavitch ... ordained .that.. this and that 

Chabad-Lubavitch opens and ordains all over the world. From Beijing to Antartica. And indeed more and more in the recent years. What I simply cannot understand is how come a minority (and extremly active) stream in modern Judaism can be representative of the ".a renaissance of Jewish life on German soil".

The issue of the "renaissance" with integration and participation of the "russian jews" in the german jewish community, their clashes and success stories is a well documented (and problematic one). Again, read the german (jewish and non jewish ) newspapers.

In their vast majority they were already above 50 when they arrived in Germany, and I would not say that their connection with judaism was/is "that big". Actually  because many of them are from mixed marriages, their offspring in Germany, no longer considers itself or has interest in their "jewishness".  The cornerstone of they identity is Russia, not Judaism. Again, read the german sources.